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Coherent scattering allows for versatile optomechanical interactions that can be used to control the motion of levitated particles. A modulated trapping beam can generate strong mechanical squeezing in both the transient and steady-state regimes. Coherent scattering also enables interactions between multiple levitated particles and is a powerful tool for levitated optomechanics applications such as force sensing and full control of particle motion.

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Novel approaches to optomechanical transduction

Optomechanical systems offer a promising route towards frequency conversion between microwaves and light. Current theoretical and experimental efforts focus on approaches based on either optomechanically induced transparency (suffering from limited conversion bandwidth) or adiabatic passage (requiring time-dependent control). In my talk, I will present two alternative strategies for optomechanical transduction that avoid these limitations. In the first one, entanglement between two superconducting qubits is generated by using transducers as force sensors; jointly measuring the force with which the qubits act on the transducers leads to conditional generation of entanglement between the qubits. The other device uses spatially adiabatic frequency conversion in an array of optomechanical transducers, allowing for large conversion bandwidth with time-independent control.

Quantum force sensing with optomechanical transducers

Optomechanical force sensing is an established measurement technique that can reach remarkable precision. In most applications, the system exerting the force on the mechanical oscillator is treated classically and we are not interested in any coherence between states of the system that give rise to different forces. A full quantum treatment, however, enables richer physics since measuring more such systems can lead to interference effects.
In this talk, I will show that the coherence can survive the measurement and can be used for quantum-technological applications. I will consider a model example of spin readout in superconducting qubits. Coupling two transmon qubits to mechanical oscillators and reading out the mechanical positions using a single beam of light provides information on the total spin of the qubits. It is thus possible to conditionally generate entanglement between the two qubits. The system represents a basic quantum network with superconducting circuits. The scheme has modest requirements on the system parameters; it does not require ground-state cooling or resolved-sideband regime and can work with quantum cooperativity moderately larger than unity.
Afterwards, I will consider another scheme, namely nondestructive detection of a single photon using an optomechanical transducer. The basic idea is similar to spin readout; the photon exerts a force on a mechanical oscillator and the the force is measured optically. I will argue that such a measurement is subject to a quantum limit due to backaction of the transducer on the dynamics of the photon and that this result also applies to other techniques of nondestructive photon detection, such as methods using Kerr interaction between the single photon and a meter beam. Finally, I will show numerically that measurement backaction can be evaded when the measurement rate is suitably modulated.

Hybrid quantum systems

In this tutorial, I will give an overview of hybrid quantum systems and their applications in quantum technologies. I will start by reviewing their individual components, focusing primarily on the theory of superconducting circuits, cavity optomechanics, and electromechanics. Afterwards, I will discuss a few applications of hybrid systems composed of these components. In particular, I will explain how opto-electro-mechanical systems can be used to achieve frequency conversion between microwaves and light and how electromechanical systems can be used to couple mechanical motion to superconducting quantum bits.

Ancilla-error-transparent swap tests in circuit quantum electrodynamics

This document discusses using Kerr-cat qubits as ancillas for performing swap tests. Kerr-cat qubits are encoded in coherent states of light and are biased towards phase flip errors. The document proposes using a Kerr-cat qubit to implement a controlled-swap gate between two other qubits via a controlled-phase beam splitter interaction. This controlled-swap gate can then be used to perform a swap test between the two qubits while inheriting the Kerr-cat qubit's noise bias towards phase flips. Performing swap tests this way could make them more robust against errors and enable applications like quantum state tomography and phase estimation.

Microwave entanglement created using swap tests with biased noise

Poster presented at the 737th WE Heraeus Seminar Advances in Scalable Hardware Platforms for Quantum Computing

Quantum networks with superconducting circuits and optomechanical transducers

Connecting distant chips in a quantum network is one of biggest challenges for superconducting quantum computers. Superconducting systems operate at microwave frequencies; transmission of microwave signals through room-temperature quantum channels is impossible due to the omnipresent thermal noise. I will show how two well-known experimental techniques—parity measurements on superconducting systems and optomechanical force sensing—can be combined to generate entanglement between two superconducting qubits through a room-temperature environment. An optomechanical transducer acting as a force sensor can be used to determine the state of a superconducting qubit. A joint readout of two qubits and postselection can lead to entanglement between the qubits. From a conceptual perspective, the transducer senses force exerted by a quantum object, entering a new paradigm in force sensing. In a typical scenario, the force sensed by an optomechanical system is classical. I will argue that the coherence between different states of the qubit (which give rise to different values of the force) can be preserved during the measurement, making it an important resource for quantum communication.

Measurement-induced long-distance entanglement with optomechanical transducers

Although superconducting systems provide a promising platform for quantum computing, their networking poses a challenge as they cannot be interfaced to light---the medium used to send quantum signals through channels at room temperature. We show that mechanical oscillators can mediated such coupling and light can be used to measure the joint state of two distant qubits. The measurement provides information on the total spin of the two qubits such that entangled qubit states can be postselected. Entanglement generation is possible without ground-state cooling of the mechanical oscillators for systems with optomechanical cooperativity moderately larger than unity; in addition, our setup tolerates a substantial transmission loss. The approach is scalable to generation of multipartite entanglement and represents a crucial step towards quantum networks with superconducting circuits.

Improved optomechanical interactions for quantum technologies

Cavity optomechanics reached remarkable success in coupling optical and mechanical degrees of freedom. The standard mechanism relies on dispersive interaction wherein a cavity mode acquires a frequency shift proportional to the mechanical displacement. Efficient coupling is, however, often impeded by large cavity decay rates or strong heating of the mechanical element by optical absorption. In this talk, I will present two strategies to circumvent this problem. In the first one, a membrane doped with an ensemble of two-level emitters or patterned with a photonic-crystal structure is used as a mechanical element. The hybridization of the cavity mode with the membrane’s internal resonance leads to a modified response, resulting in an effective narrow cavity linewidth. I will show how such systems can be described quantum mechanically and discuss how optomechanical sideband cooling can be improved by the presence of the internal resonance. Second, I will discuss optomechanics with levitated particles and show how coherent scattering can be used to generate strong mechanical squeezing. In this system, the standard dispersive interaction is replaced by scattering of the trapping beam into an empty cavity mode. This process can result in strong, controllable coupling between the cavity mode and the motion of the particle with minimal absorption heating. I will also briefly outline how this type of interaction can be used to engineer coupling between different center-of-mass modes of the particle allowing, in principle, full optomechanical control of the particle motion.

Novel approaches to optomechanical transduction

Optomechanical systems offer a promising route towards frequency conversion between microwaves and light. Current theoretical and experimental efforts focus on approaches based on either optomechanically induced transparency (suffering from limited conversion bandwidth) or adiabatic passage (requiring time-dependent control). In my talk, I will present two alternative strategies for optomechanical transduction that avoid these limitations. In the first one, entanglement between two superconducting qubits is generated by using transducers as force sensors; jointly measuring the force with which the qubits act on the transducers leads to conditional generation of entanglement between the qubits. The other device uses spatially adiabatic frequency conversion in an array of optomechanical transducers, allowing for large conversion bandwidth with time-independent control.

Quantum force sensing with optomechanical transducers

Optomechanical force sensing is an established measurement technique that can reach remarkable precision. In most applications, the system exerting the force on the mechanical oscillator is treated classically and we are not interested in any coherence between states of the system that give rise to different forces. A full quantum treatment, however, enables richer physics since measuring more such systems can lead to interference effects.
In this talk, I will show that the coherence can survive the measurement and can be used for quantum-technological applications. I will consider a model example of spin readout in superconducting qubits. Coupling two transmon qubits to mechanical oscillators and reading out the mechanical positions using a single beam of light provides information on the total spin of the qubits. It is thus possible to conditionally generate entanglement between the two qubits. The system represents a basic quantum network with superconducting circuits. The scheme has modest requirements on the system parameters; it does not require ground-state cooling or resolved-sideband regime and can work with quantum cooperativity moderately larger than unity.
Afterwards, I will consider another scheme, namely nondestructive detection of a single photon using an optomechanical transducer. The basic idea is similar to spin readout; the photon exerts a force on a mechanical oscillator and the the force is measured optically. I will argue that such a measurement is subject to a quantum limit due to backaction of the transducer on the dynamics of the photon and that this result also applies to other techniques of nondestructive photon detection, such as methods using Kerr interaction between the single photon and a meter beam. Finally, I will show numerically that measurement backaction can be evaded when the measurement rate is suitably modulated.

Hybrid quantum systems

In this tutorial, I will give an overview of hybrid quantum systems and their applications in quantum technologies. I will start by reviewing their individual components, focusing primarily on the theory of superconducting circuits, cavity optomechanics, and electromechanics. Afterwards, I will discuss a few applications of hybrid systems composed of these components. In particular, I will explain how opto-electro-mechanical systems can be used to achieve frequency conversion between microwaves and light and how electromechanical systems can be used to couple mechanical motion to superconducting quantum bits.

Ancilla-error-transparent swap tests in circuit quantum electrodynamics

This document discusses using Kerr-cat qubits as ancillas for performing swap tests. Kerr-cat qubits are encoded in coherent states of light and are biased towards phase flip errors. The document proposes using a Kerr-cat qubit to implement a controlled-swap gate between two other qubits via a controlled-phase beam splitter interaction. This controlled-swap gate can then be used to perform a swap test between the two qubits while inheriting the Kerr-cat qubit's noise bias towards phase flips. Performing swap tests this way could make them more robust against errors and enable applications like quantum state tomography and phase estimation.

Microwave entanglement created using swap tests with biased noise

Poster presented at the 737th WE Heraeus Seminar Advances in Scalable Hardware Platforms for Quantum Computing

Quantum networks with superconducting circuits and optomechanical transducers

Connecting distant chips in a quantum network is one of biggest challenges for superconducting quantum computers. Superconducting systems operate at microwave frequencies; transmission of microwave signals through room-temperature quantum channels is impossible due to the omnipresent thermal noise. I will show how two well-known experimental techniques—parity measurements on superconducting systems and optomechanical force sensing—can be combined to generate entanglement between two superconducting qubits through a room-temperature environment. An optomechanical transducer acting as a force sensor can be used to determine the state of a superconducting qubit. A joint readout of two qubits and postselection can lead to entanglement between the qubits. From a conceptual perspective, the transducer senses force exerted by a quantum object, entering a new paradigm in force sensing. In a typical scenario, the force sensed by an optomechanical system is classical. I will argue that the coherence between different states of the qubit (which give rise to different values of the force) can be preserved during the measurement, making it an important resource for quantum communication.

Measurement-induced long-distance entanglement with optomechanical transducers

Although superconducting systems provide a promising platform for quantum computing, their networking poses a challenge as they cannot be interfaced to light---the medium used to send quantum signals through channels at room temperature. We show that mechanical oscillators can mediated such coupling and light can be used to measure the joint state of two distant qubits. The measurement provides information on the total spin of the two qubits such that entangled qubit states can be postselected. Entanglement generation is possible without ground-state cooling of the mechanical oscillators for systems with optomechanical cooperativity moderately larger than unity; in addition, our setup tolerates a substantial transmission loss. The approach is scalable to generation of multipartite entanglement and represents a crucial step towards quantum networks with superconducting circuits.

Improved optomechanical interactions for quantum technologies

Cavity optomechanics reached remarkable success in coupling optical and mechanical degrees of freedom. The standard mechanism relies on dispersive interaction wherein a cavity mode acquires a frequency shift proportional to the mechanical displacement. Efficient coupling is, however, often impeded by large cavity decay rates or strong heating of the mechanical element by optical absorption. In this talk, I will present two strategies to circumvent this problem. In the first one, a membrane doped with an ensemble of two-level emitters or patterned with a photonic-crystal structure is used as a mechanical element. The hybridization of the cavity mode with the membrane’s internal resonance leads to a modified response, resulting in an effective narrow cavity linewidth. I will show how such systems can be described quantum mechanically and discuss how optomechanical sideband cooling can be improved by the presence of the internal resonance. Second, I will discuss optomechanics with levitated particles and show how coherent scattering can be used to generate strong mechanical squeezing. In this system, the standard dispersive interaction is replaced by scattering of the trapping beam into an empty cavity mode. This process can result in strong, controllable coupling between the cavity mode and the motion of the particle with minimal absorption heating. I will also briefly outline how this type of interaction can be used to engineer coupling between different center-of-mass modes of the particle allowing, in principle, full optomechanical control of the particle motion.

Measurement-induced long-distance entanglement of superconducting qubits usin...

1. The document proposes using optomechanical transducers to entangle superconducting qubits over long distances.
2. An optomechanical transducer can act as a force sensor to measure superconducting qubits coupled to a mechanical oscillator.
3. The mechanical oscillator is modeled using a conditional master equation and can be adiabatically eliminated to obtain an effective equation describing the qubits.

NANO266 - Lecture 3 - Beyond the Hartree-Fock Approximation

UCSD NANO 266 Quantum Mechanical Modelling of Materials and Nanostructures is a graduate class that provides students with a highly practical introduction to the application of first principles quantum mechanical simulations to model, understand and predict the properties of materials and nano-structures. The syllabus includes: a brief introduction to quantum mechanics and the Hartree-Fock and density functional theory (DFT) formulations; practical simulation considerations such as convergence, selection of the appropriate functional and parameters; interpretation of the results from simulations, including the limits of accuracy of each method. Several lab sessions provide students with hands-on experience in the conduct of simulations. A key aspect of the course is in the use of programming to facilitate calculations and analysis.

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UCSD NANO 266 Quantum Mechanical Modelling of Materials and Nanostructures is a graduate class that provides students with a highly practical introduction to the application of first principles quantum mechanical simulations to model, understand and predict the properties of materials and nano-structures. The syllabus includes: a brief introduction to quantum mechanics and the Hartree-Fock and density functional theory (DFT) formulations; practical simulation considerations such as convergence, selection of the appropriate functional and parameters; interpretation of the results from simulations, including the limits of accuracy of each method. Several lab sessions provide students with hands-on experience in the conduct of simulations. A key aspect of the course is in the use of programming to facilitate calculations and analysis.

Uppsala department presentation

This document summarizes research on investigating relativistic spin-photon interactions in magneto-optics. It outlines the theory behind modeling the interactions using a modified Dirac Hamiltonian and Foldy-Wouthuysen transformation. Results are presented for nickel showing a small modification (<0.1%) to magneto-optical Kerr effect spectra when including relativistic interactions. The conclusion is that while relativistic spin-photon interactions proposed by prior work do exist, they only give a minor contribution to demagnetization effects. Higher-order coupling between electron spin and spin angular momentum of light is also discussed as a new way to optically manipulate electron spins.

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The document summarizes a relativistic theory of spin relaxation mechanisms in the Landau-Lifshitz equations of spin dynamics. It presents a modified Dirac Hamiltonian approach that includes spin-orbit coupling terms arising from the electron's relativistic motion. This leads to new expressions for the intrinsic Gilbert damping parameter and magnetization dynamics that depend on the electron momentum and susceptibility tensor. It also describes how the theory preserves the conservation of total angular momentum, including the effects of exchange interactions.

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NANO266 - Lecture 1 - Introduction to Quantum MechanicsUCSD NANO 266 Quantum Mechanical Modelling of Materials and Nanostructures is a graduate class that provides students with a highly practical introduction to the application of first principles quantum mechanical simulations to model, understand and predict the properties of materials and nano-structures. The syllabus includes: a brief introduction to quantum mechanics and the Hartree-Fock and density functional theory (DFT) formulations; practical simulation considerations such as convergence, selection of the appropriate functional and parameters; interpretation of the results from simulations, including the limits of accuracy of each method. Several lab sessions provide students with hands-on experience in the conduct of simulations. A key aspect of the course is in the use of programming to facilitate calculations and analysis.

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NANO106 is UCSD Department of NanoEngineering's core course on crystallography of materials taught by Prof Shyue Ping Ong. For more information, visit the course wiki at http://nano106.wikispaces.com.

E04933745

The document presents a simplified model Hamiltonian to calculate the density of magnetic impurity states and study the formation of local magnetic moments in a non-magnetic metal host. The Anderson impurity Hamiltonian is transformed into an effective one-body Hamiltonian using second quantization. Equations of motion for double-time retarded Green's functions are derived and used to calculate the density of impurity states and average occupation numbers. A phase diagram is presented showing how local magnetic moments form under different physical parameter conditions determined by hybridization energy, impurity energy levels, and on-site Coulomb repulsion.

Nonlinear response of solids with Green's functions and TD-D(P)FT

This document summarizes nonlinear response theory using real-time propagation of the wavefunction. The wavefunction approach allows calculating nonlinear response to all orders using the same equations of motion. Local fields and excitonic effects are important beyond linear response. Time-dependent density functional theory may provide an alternative, but functionals must depend on both density and polarization to describe nonlinear optics in solids. Developing such functional is an important open problem. Applications include second and third harmonic generation in semiconductors and two-dimensional materials.

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The document summarizes research on vibration energy harvesting under uncertainty. It discusses piezoelectric energy harvesting using cantilever beams and focuses on harvesting from single frequencies at resonance. It notes that most previous work assumes certain input but uncertainty exists in real environments. The document outlines sources of uncertainty in excitation and system parameters and presents linear and nonlinear models of piezoelectric energy harvesters. It transforms models into the frequency domain to analyze optimal harvester design under Gaussian excitation without an inductor.

giessen short

Atomic and molecular ion merged-beams experiments provide absolute charge transfer cross section measurements from keV/u to meV/u energies. This allows studying charge transfer processes important for fusion plasmas, astrophysics, and other applications. The technique uses intense ion beams merged with atomic hydrogen beams. Recent work includes measurements of charge transfer from highly charged ions like C6+ and O8+ to gases like hydrogen and krypton, observing x-ray emission. Future work aims to study charge transfer reactions of molecular ions like D2+ and CO+ with hydrogen, comparing results to state-to-state calculations. These experiments provide benchmark data to advance understanding of low-energy ion-atom interactions.

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Why radiodetection of UHECR still matters ? Karlsruhe Institute of Technol...

In the field of radiodetection in astroparticle physics, the Codalema experiment is devoted to the detection of ultra high energy cosmic rays by the radio method. The main objective is to study the features of the radio signal induced by the development of extensive air showers (EAS) generated by cosmic rays in the energy range of 10 PeV-1 EeV. After a brief presentation of the recent results of UHECR, a description the CODALEMA II and III experiments characteristics is reported.
Next, a study of the response in energy of the radio-detection method is presented. The analysis of the CODALEMA II experiment data shows that a strong correlation can be demonstrated between the primary energy and the electric field amplitude on the axis shower. Its sensitivity to the shower characteristics suggests that energy resolution of less than 20% can be achieved. It suggests also that, not only the geomagnetic emission, but also another contribution proportional to all charged particles number in the shower, could play a significant role in the radio emission measured by the antennas (as Askaryan charge-excess radiation or a Cherenkov like coherence effect).
Finally, the transition from small-scale prototype experiments, triggered by particle detectors, to large-scale antenna array experiments based on standalone detection, has emerged new problems. These problems are related to the localization, recognition and the suppression of the noisy background sources induced by human activities (such as high voltage power lines, electric transformers, cars, trains and planes) or by stormy weather conditions (such as lightning). In this talk, we focus on the localization problem which belongs to a class of more general problems usually termed as inverse problems. Many studies have shown the strong dependence of the solution of the radio-transient sources localization problem (the radio wavefront time of arrival on antennas TOA), such solutions are purely numerical artifacts. Based on a detailed analysis of some already published results of radio-detection experiments like : CODALEMA 3 in France, AERA in Argentina, TREND in China and LUNASKA in Australia, we demonstrate the ill-posed character of this problem in the sense of Hadamard. Two approaches have been used as the existence of solutions degeneration and the bad conditioning of the mathematical formulation of the problem. A comparison between the experimental results and the simulations have been made, to support the mathematical studies. Many properties of the non-linear least square function are discussed such as the configuration of the set of solutions and the bias.

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Measurement-induced long-distance entanglement of superconducting qubits usin...

Although superconducting systems provide a promising platform for quantum computing, their networking poses a challenge as they cannot be interfaced to light---the medium used to send quantum signals through channels at room temperature. We show that mechanical oscillators can mediated such coupling and light can be used to measure the joint state of two distant qubits. The measurement provides information on the total spin of the two qubits such that entangled qubit states can be postselected. Entanglement generation is possible without ground-state cooling of the mechanical oscillators for systems with optomechanical cooperativity moderately larger than unity; in addition, our setup tolerates a substantial transmission loss. The approach is scalable to generation of multipartite entanglement and represents a crucial step towards quantum networks with superconducting circuits.

Measurement-induced long-distance entanglement of superconducting qubits usin...

1. The document proposes using optomechanical transducers to entangle superconducting qubits over long distances.
2. An optomechanical transducer can act as a force sensor to measure superconducting qubits coupled to a mechanical oscillator.
3. The mechanical oscillator is modeled using a conditional master equation and can be adiabatically eliminated to obtain an effective equation describing the qubits.

NANO266 - Lecture 3 - Beyond the Hartree-Fock ApproximationUCSD NANO 266 Quantum Mechanical Modelling of Materials and Nanostructures is a graduate class that provides students with a highly practical introduction to the application of first principles quantum mechanical simulations to model, understand and predict the properties of materials and nano-structures. The syllabus includes: a brief introduction to quantum mechanics and the Hartree-Fock and density functional theory (DFT) formulations; practical simulation considerations such as convergence, selection of the appropriate functional and parameters; interpretation of the results from simulations, including the limits of accuracy of each method. Several lab sessions provide students with hands-on experience in the conduct of simulations. A key aspect of the course is in the use of programming to facilitate calculations and analysis.

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Uppsala department presentation

This document summarizes research on investigating relativistic spin-photon interactions in magneto-optics. It outlines the theory behind modeling the interactions using a modified Dirac Hamiltonian and Foldy-Wouthuysen transformation. Results are presented for nickel showing a small modification (<0.1%) to magneto-optical Kerr effect spectra when including relativistic interactions. The conclusion is that while relativistic spin-photon interactions proposed by prior work do exist, they only give a minor contribution to demagnetization effects. Higher-order coupling between electron spin and spin angular momentum of light is also discussed as a new way to optically manipulate electron spins.

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Relativistic theory of spin relaxation mechanisms in the Landau-Lifshitz equa...

The document summarizes a relativistic theory of spin relaxation mechanisms in the Landau-Lifshitz equations of spin dynamics. It presents a modified Dirac Hamiltonian approach that includes spin-orbit coupling terms arising from the electron's relativistic motion. This leads to new expressions for the intrinsic Gilbert damping parameter and magnetization dynamics that depend on the electron momentum and susceptibility tensor. It also describes how the theory preserves the conservation of total angular momentum, including the effects of exchange interactions.

NANO266 - Lecture 2 - The Hartree-Fock ApproachUCSD NANO 266 Quantum Mechanical Modelling of Materials and Nanostructures is a graduate class that provides students with a highly practical introduction to the application of first principles quantum mechanical simulations to model, understand and predict the properties of materials and nano-structures. The syllabus includes: a brief introduction to quantum mechanics and the Hartree-Fock and density functional theory (DFT) formulations; practical simulation considerations such as convergence, selection of the appropriate functional and parameters; interpretation of the results from simulations, including the limits of accuracy of each method. Several lab sessions provide students with hands-on experience in the conduct of simulations. A key aspect of the course is in the use of programming to facilitate calculations and analysis.

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UCSD NANO106 - 11 - X-rays and their interaction with matter

NANO106 is UCSD Department of NanoEngineering's core course on crystallography of materials taught by Prof Shyue Ping Ong. For more information, visit the course wiki at http://nano106.wikispaces.com.

E04933745

The document presents a simplified model Hamiltonian to calculate the density of magnetic impurity states and study the formation of local magnetic moments in a non-magnetic metal host. The Anderson impurity Hamiltonian is transformed into an effective one-body Hamiltonian using second quantization. Equations of motion for double-time retarded Green's functions are derived and used to calculate the density of impurity states and average occupation numbers. A phase diagram is presented showing how local magnetic moments form under different physical parameter conditions determined by hybridization energy, impurity energy levels, and on-site Coulomb repulsion.

Nonlinear response of solids with Green's functions and TD-D(P)FT

This document summarizes nonlinear response theory using real-time propagation of the wavefunction. The wavefunction approach allows calculating nonlinear response to all orders using the same equations of motion. Local fields and excitonic effects are important beyond linear response. Time-dependent density functional theory may provide an alternative, but functionals must depend on both density and polarization to describe nonlinear optics in solids. Developing such functional is an important open problem. Applications include second and third harmonic generation in semiconductors and two-dimensional materials.

NANO266 - Lecture 13 - Ab initio molecular dyanmicsUCSD NANO 266 Quantum Mechanical Modelling of Materials and Nanostructures is a graduate class that provides students with a highly practical introduction to the application of first principles quantum mechanical simulations to model, understand and predict the properties of materials and nano-structures. The syllabus includes: a brief introduction to quantum mechanics and the Hartree-Fock and density functional theory (DFT) formulations; practical simulation considerations such as convergence, selection of the appropriate functional and parameters; interpretation of the results from simulations, including the limits of accuracy of each method. Several lab sessions provide students with hands-on experience in the conduct of simulations. A key aspect of the course is in the use of programming to facilitate calculations and analysis.

Vibration energy harvesting under uncertainty

The document summarizes research on vibration energy harvesting under uncertainty. It discusses piezoelectric energy harvesting using cantilever beams and focuses on harvesting from single frequencies at resonance. It notes that most previous work assumes certain input but uncertainty exists in real environments. The document outlines sources of uncertainty in excitation and system parameters and presents linear and nonlinear models of piezoelectric energy harvesters. It transforms models into the frequency domain to analyze optimal harvester design under Gaussian excitation without an inductor.

giessen short

Atomic and molecular ion merged-beams experiments provide absolute charge transfer cross section measurements from keV/u to meV/u energies. This allows studying charge transfer processes important for fusion plasmas, astrophysics, and other applications. The technique uses intense ion beams merged with atomic hydrogen beams. Recent work includes measurements of charge transfer from highly charged ions like C6+ and O8+ to gases like hydrogen and krypton, observing x-ray emission. Future work aims to study charge transfer reactions of molecular ions like D2+ and CO+ with hydrogen, comparing results to state-to-state calculations. These experiments provide benchmark data to advance understanding of low-energy ion-atom interactions.

Hyperon and charm baryon axial charges from Lattice QCD

Talk presented at the Electromagnetic Interactions of Nucleons and Nuclei 2015 (EINN 2015) conference, Paphos, Cyprus. In this talk we present results on the axial charges of all forty light, strange and charm baryons from Lattice QCD calculations.

Why radiodetection of UHECR still matters ? Karlsruhe Institute of Technol...

In the field of radiodetection in astroparticle physics, the Codalema experiment is devoted to the detection of ultra high energy cosmic rays by the radio method. The main objective is to study the features of the radio signal induced by the development of extensive air showers (EAS) generated by cosmic rays in the energy range of 10 PeV-1 EeV. After a brief presentation of the recent results of UHECR, a description the CODALEMA II and III experiments characteristics is reported.
Next, a study of the response in energy of the radio-detection method is presented. The analysis of the CODALEMA II experiment data shows that a strong correlation can be demonstrated between the primary energy and the electric field amplitude on the axis shower. Its sensitivity to the shower characteristics suggests that energy resolution of less than 20% can be achieved. It suggests also that, not only the geomagnetic emission, but also another contribution proportional to all charged particles number in the shower, could play a significant role in the radio emission measured by the antennas (as Askaryan charge-excess radiation or a Cherenkov like coherence effect).
Finally, the transition from small-scale prototype experiments, triggered by particle detectors, to large-scale antenna array experiments based on standalone detection, has emerged new problems. These problems are related to the localization, recognition and the suppression of the noisy background sources induced by human activities (such as high voltage power lines, electric transformers, cars, trains and planes) or by stormy weather conditions (such as lightning). In this talk, we focus on the localization problem which belongs to a class of more general problems usually termed as inverse problems. Many studies have shown the strong dependence of the solution of the radio-transient sources localization problem (the radio wavefront time of arrival on antennas TOA), such solutions are purely numerical artifacts. Based on a detailed analysis of some already published results of radio-detection experiments like : CODALEMA 3 in France, AERA in Argentina, TREND in China and LUNASKA in Australia, we demonstrate the ill-posed character of this problem in the sense of Hadamard. Two approaches have been used as the existence of solutions degeneration and the bad conditioning of the mathematical formulation of the problem. A comparison between the experimental results and the simulations have been made, to support the mathematical studies. Many properties of the non-linear least square function are discussed such as the configuration of the set of solutions and the bias.

Parity-Violating and Parity-Conserving Asymmetries in ep and eN Scattering in...

Invited workshop presentation at the Amherst Center for Fundamental Interactions at UMass Amherst. This presentation includes the official Qweak results and discussion of unofficial beam normal single spin asymmetries.

ICTON 2014 - Third-and Fifth-order Optical Nonlinearities Characterization Us...

Presentation of third- and fifth-order optical nonlinearities measurement using the D4Sigma-Z-scan Method. I present a resolution of propagation equation in general case (with third- and fifth-order nonlinearities) and a numerical inversion.
This presentation is conclude with experimental results.

Eh4 energy harvesting due to random excitations and optimal design

This lecture is about vibration energy harvesting when both the excitation and the system have uncertainties. Two cases, namely, when the excitation is a random process and when the system parameters are described by random variables are described. Optimal design for both cases is discussed.

UCSD NANO106 - 12 - X-ray diffractionNANO106 is UCSD Department of NanoEngineering's core course on crystallography of materials taught by Prof Shyue Ping Ong. For more information, visit the course wiki at http://nano106.wikispaces.com.

Measurement-induced long-distance entanglement of superconducting qubits usin...

Measurement-induced long-distance entanglement of superconducting qubits usin...

NANO266 - Lecture 3 - Beyond the Hartree-Fock Approximation

NANO266 - Lecture 3 - Beyond the Hartree-Fock Approximation

NANO266 - Lecture 8 - Properties of Periodic Solids

NANO266 - Lecture 8 - Properties of Periodic Solids

Uppsala department presentation

Uppsala department presentation

NANO266 - Lecture 4 - Introduction to DFT

NANO266 - Lecture 4 - Introduction to DFT

Relativistic theory of spin relaxation mechanisms in the Landau-Lifshitz equa...

Relativistic theory of spin relaxation mechanisms in the Landau-Lifshitz equa...

NANO266 - Lecture 2 - The Hartree-Fock Approach

NANO266 - Lecture 2 - The Hartree-Fock Approach

NANO266 - Lecture 1 - Introduction to Quantum Mechanics

NANO266 - Lecture 1 - Introduction to Quantum Mechanics

UCSD NANO106 - 11 - X-rays and their interaction with matter

UCSD NANO106 - 11 - X-rays and their interaction with matter

E04933745

E04933745

Nonlinear response of solids with Green's functions and TD-D(P)FT

Nonlinear response of solids with Green's functions and TD-D(P)FT

NANO266 - Lecture 13 - Ab initio molecular dyanmics

NANO266 - Lecture 13 - Ab initio molecular dyanmics

Vibration energy harvesting under uncertainty

Vibration energy harvesting under uncertainty

giessen short

giessen short

Hyperon and charm baryon axial charges from Lattice QCD

Hyperon and charm baryon axial charges from Lattice QCD

Why radiodetection of UHECR still matters ? Karlsruhe Institute of Technol...

Why radiodetection of UHECR still matters ? Karlsruhe Institute of Technol...

Parity-Violating and Parity-Conserving Asymmetries in ep and eN Scattering in...

Parity-Violating and Parity-Conserving Asymmetries in ep and eN Scattering in...

ICTON 2014 - Third-and Fifth-order Optical Nonlinearities Characterization Us...

ICTON 2014 - Third-and Fifth-order Optical Nonlinearities Characterization Us...

Eh4 energy harvesting due to random excitations and optimal design

Eh4 energy harvesting due to random excitations and optimal design

UCSD NANO106 - 12 - X-ray diffraction

UCSD NANO106 - 12 - X-ray diffraction

Gaussian control and readout of levitated nanoparticles via coherent scattering

Optically levitated nanoparticles present an attractive optomechanical platform owing to their lack of clamping losses. The most promising approach to control the state of nanoparticle motion is coherent scattering of tweezer photons into a cavity mode. Originally proposed as a technique for cooling the motion of atoms and ions, this mechanism has recently been used to cool the motion of a nanoparticle to its quantum ground state for the first time. In my presentation, I will discuss how coherent scattering can be used to create and measure complex motional states of levitated nanoparticles. Coherent scattering gives us access to the same basic types of interaction as the more usual radiation-pressure interaction (of the beam-splitter and two-mode-squeezing type) allowing the same protocols to be realized. An important distinction—relevant particularly for quantum nondemolition readout of nanoparticle motion—is that coherent scattering can be accompanied by additional effects modifying the free nanoparticle evolution. I will discuss these differences and address the consequences they have for controlling and measuring nanoparticle motion in the quantum regime.

Measurement-induced long-distance entanglement of superconducting qubits usin...Although superconducting systems provide a promising platform for quantum computing, their networking poses a challenge as they cannot be interfaced to light---the medium used to send quantum signals through channels at room temperature. We show that mechanical oscillators can mediated such coupling and light can be used to measure the joint state of two distant qubits. The measurement provides information on the total spin of the two qubits such that entangled qubit states can be postselected. Entanglement generation is possible without ground-state cooling of the mechanical oscillators for systems with optomechanical cooperativity moderately larger than unity; in addition, our setup tolerates a substantial transmission loss. The approach is scalable to generation of multipartite entanglement and represents a crucial step towards quantum networks with superconducting circuits.

￼FAST実験2：新型大気蛍光望遠鏡の性能評価

1. The document describes the Fluorescence detector Array of Single-pixel Telescopes (FAST) project, which aims to develop an economical fluorescence detector array to detect ultra-high energy cosmic rays and neutral particles.
2. A full-scale FAST prototype is being constructed and tested. It is expected to be installed at the Telescope Array experiment site in Utah in June 2016 to perform calibration and cross-checks with the existing detectors.
3. Preliminary simulations show that the combined analysis of data from FAST and the surface detector array could provide an energy resolution of 10% and an Xmax resolution of 35 g/cm2 for protons at 10^19.5 eV.

FINE CHARACTERIZATION OF NANOSCALE MATERIALS BY TEM METHODS

Plenary lecture of the XX B-MRS Meeting given by Daniel Ugarte (UNICAMP) on September 27, 2022 at Foz do Iguaçu (Brazil).

Improved optomechanical interactions for quantum technologies

Cavity optomechanics reached remarkable success in coupling optical and mechanical degrees of freedom. The standard mechanism relies on dispersive interaction wherein a cavity mode acquires a frequency shift proportional to the mechanical displacement. Efficient coupling is, however, often impeded by large cavity decay rates or strong heating of the mechanical element by optical absorption. In this talk, I will present two strategies to circumvent this problem. In the first one, a membrane doped with an ensemble of two-level emitters or patterned with a photonic-crystal structure is used as a mechanical element. The hybridization of the cavity mode with the membrane’s internal resonance leads to a modified response, resulting in an effective narrow cavity linewidth. I will show how such systems can be described quantum mechanically and discuss how optomechanical sideband cooling can be improved by the presence of the internal resonance. Second, I will discuss optomechanics with levitated particles and show how coherent scattering can be used to generate strong mechanical squeezing. In this system, the standard dispersive interaction is replaced by scattering of the trapping beam into an empty cavity mode. This process can result in strong, controllable coupling between the cavity mode and the motion of the particle with minimal absorption heating. I will also briefly outline how this type of interaction can be used to engineer coupling between different center-of-mass modes of the particle allowing, in principle, full optomechanical control of the particle motion.

Implementation of Radon Transformation for Electrical Impedance Tomography (E...

Radon Transformation is generally used to construct optical image (like CT image) from the projection data in biomedical imaging. In this paper, the concept of Radon Transformation is implemented to reconstruct Electrical Impedance Topographic Image (conductivity or resistivity distribution) of a circular subject. A parallel resistance model of a subject is proposed for Electrical Impedance Topography(EIT) or Magnetic Induction Tomography(MIT). A circular subject with embedded circular objects is segmented into equal width slices from different angles. For each angle, Conductance and Conductivity of each slice is calculated and stored in an array. A back projection method is used to generate a two-dimensional image from one-dimensional projections. As a back projection method, Inverse Radon Transformation is applied on the calculated conductance and conductivity to reconstruct two dimensional images. These images are compared to the target image. In the time of image reconstruction, different filters are used and these images are compared with each other and target image.

Implementation of Radon Transformation for Electrical Impedance Tomography (EIT)

Radon Transformation is generally used to construct optical image (like CT image) from the projection data in biomedical imaging. In this paper, the concept of Radon Transformation is implemented to reconstruct Electrical Impedance Topographic Image (conductivity or resistivity distribution) of a circular subject. A parallel resistance model of a subject is proposed for Electrical Impedance Topography(EIT) or Magnetic Induction Tomography(MIT). A circular subject with embedded circular objects is segmented into equal width slices from different angles. For each angle, Conductance and Conductivity of each slice is calculated and stored in an array. A back projection method is used to generate a two-dimensional image from one-dimensional projections. As a back projection method, Inverse Radon Transformation is applied on the calculated conductance and conductivity to reconstruct two dimensional images. These images are compared to the target image. In the time of image reconstruction, different filters are used and these images are compared with each other and target image.

Modeling organic electronics with ADF

Overview of unique capabilities of the ADF modeling suite to model properties of organic electronics (charge transport, phosphorescence, light absorbance). Highlighted with examples from the recent literature.

Motional Gaussian states and gates for a levitating particle

Coherent scattering has recently attracted attention as a means of controlling the motion of levitated particles in three dimensions using a single optical cavity. In these systems, scattering of photons from the trapping field to a cavity mode has been used to cool all three modes of the centre-of-mass motion of levitated particles. The possibility of employing coherent scattering for more general quantum control has, however, not yet been discussed in the literature. Here, we present strategies for generating nonclassical correlations and for engineering interactions between motional modes of levitated particles using coherent scattering. We expand the theory developed by Gonzalez-Ballestero et al. to realize more general bilinear interactions in levitated optomechanics with coherent scattering. Going beyond the simple stationary picture, we introduce amplitude modulation as an important tool to modify the optomechanical interaction and discuss how it can be used to resonantly enhanced certain parts of the interaction, allowing, for example, strong one- and two-mode squeezing of motion. Our results thus show the potential of using coherent scattering for full quantum control of the motion of levitated particles.

Novel approaches to optomechanical transduction

Slides for a presentation I gave at the Spring meeting of the German Physical Society in Mainz on March 10, 2017.
In the presentation, I discuss new approaches to frequency conversion of electromagnetic fields using optomechanical interaction. The main figure of merit we are trying to optimize is the transduction bandwidth. I show that the bandwidth can be enhanced by using spatially adiabatic state transfer in an array of conventional optomechanical transducers.

Measurement-induced long-distance entanglement of superconducting qubits usin...Although superconducting systems provide a promising platform for quantum computing, their networking poses a challenge as they cannot be interfaced to light---the medium used to send quantum signals through channels at room temperature. We show that mechanical oscillators can mediated such coupling and light can be used to measure the joint state of two distant qubits. The measurement provides information on the total spin of the two qubits such that entangled qubit states can be postselected. Entanglement generation is possible without ground-state cooling of the mechanical oscillators for systems with optomechanical cooperativity moderately larger than unity; in addition, our setup tolerates a substantial transmission loss. The approach is scalable to generation of multipartite entanglement and represents a crucial step towards quantum networks with superconducting circuits.

First results from a prototype for the Fluorescence detector Array of Single-...

The document describes the Fluorescence detector Array of Single-pixel Telescopes (FAST) concept for observing ultra-high energy cosmic rays. The FAST prototype was tested using the EUSO-TA telescope and detected laser shots and 16 air shower candidates in coincidence with the Telescope Array fluorescence detector. A new FAST prototype is being constructed to establish its sensitivity and detect air shower profiles including the depth of shower maximum. The document outlines future plans to install FAST at the Pierre Auger Observatory and Telescope Array for cross-calibration and to independently measure energy and air shower maximum between the two experiments using a low-cost simplified fluorescence detector design.

Angular and position stability of a nanorod trapped in an optical tweezers

The document summarizes the analysis of angular and position stability of a nanorod trapped in an optical tweezers. It computes the optical trapping forces and torques on a nano-cylinder using T-matrix and radiation stress integration approaches. The results show that lateral forces are several times stronger than axial forces, and lateral torques are 1-2 orders stronger than end-face torques. Torques due to surface stress are much stronger than spin torques. The analysis explains why low aspect ratio nanorods are stably trapped normal to the beam axis.

Publication

This document summarizes a study that demonstrates the use of equally-sloped tomography (EST) to improve electron tomography reconstruction. EST acquires projection images at constant slope increments, allowing the use of a pseudo-polar fast Fourier transform to directly relate the projection and volume grids. The study applied EST to reconstruct frozen keyhole limpet hemocyanin molecules and a bacterial cell from tilt-series data. EST reconstructions exhibited higher contrast, less noise, clearer boundaries, and reduced missing wedge effects compared to other reconstruction methods. Surprisingly, EST reconstructions using only two-thirds of the original projections appeared to have the same resolution as full reconstructions using other methods, suggesting EST can reduce radiation dose requirements or allow higher resolutions.

The FAST Project - Next Generation UHECR Observatory -

The FAST project aims to build a next generation ultra-high energy cosmic ray observatory consisting of an array of single-pixel telescopes called FAST (Fluorescence detector Array of Single-pixel Telescopes). Each telescope would have a 1 square meter aperture and camera with 4 photomultiplier tubes covering a 30x30 degree field of view. An array of 500 such telescopes spaced 20 km apart could cover an area of 150,000 square km. This would provide over 10 times the exposure of the Telescope Array and allow for precision measurements of UHECR spectrum and mass composition above 10^19.5 eV as well as searches for ultra-high energy photons and neutrinos. A full-scale FAST prototype

PHYSICS.pdf

The document discusses the four fundamental forces in nature - gravitational force, electromagnetic force, weak nuclear force, and strong nuclear force. It provides key details about each force, including their relative strengths and ranges of effect. The gravitational force is the weakest but has an infinite range. The strong nuclear force has the strongest strength but shortest range of only nuclear size. The electromagnetic and weak nuclear forces have intermediate strengths and ranges.

Automatic eye fixations identification based on analysis of variance and cova...

Eye movement is the simplest and repetitive movement that enables humans to interact with the environment. The common daily activities, such as reading a book or watching television, involve this natural
activity, which consists of rapidly shifting our gaze from one region to another. In clinical application, the
identification of the main components of eye movement during visual exploration, such as fixations and
saccades, is the objective of the analysis of eye movements: however, in patients affected by motor control disorder the identification of fixation is not banal. This work presents a new fixation identification
algorithm based on the analysis of variance and covariance: the main idea was to use bivariate statistical
analysis to compare variance overxandyto identify fixation. We describe the new algorithm, and we
compare it with the common fixations algorithm based on dispersion. To demonstrate the performance
of our approach, we tested the algorithm in a group of healthy subjects and patients affected by motor
control disorder

Observing ultra-high energy cosmic rays with prototypes of the Fluorescence d...

1. The document describes observations of ultra-high energy cosmic rays using prototypes of the Fluorescence detector Array of Single-pixel Telescopes (FAST) project in both hemispheres.
2. FAST aims to observe cosmic rays with energies over 10^20 eV using an array of low-cost telescopes to cover a large ground area.
3. Initial results are presented from FAST prototypes installed at the Telescope Array site, including coincident observations of air showers with the Telescope Array fluorescence detector and reconstruction of shower parameters from FAST data.

Ion-acoustic rogue waves in multi-ion plasmas

This document summarizes a presentation on ion-acoustic rogue waves in multi-ion plasmas. The presentation includes:
1. An introduction to ion-acoustic waves in pair-ion plasma medium and the derivation of the nonlinear Schrodinger equation to model the system.
2. Analysis showing the modulational instability of ion-acoustic waves leads to the generation of rogue waves in unstable regions where the ratio P/Q is positive.
3. Results demonstrating how parameters like the non-thermal parameter, mass ratios of positive and negative ions, and temperatures of inertialess components affect the stable and unstable wave regions and properties of first and second order rogue waves.

Interference effects in cavity optomechanics with hybridized membranes

1) The document discusses interference effects in cavity optomechanics systems with hybridized membranes. It describes how adding two-level systems or gratings to membranes can lead to Fano resonances in the cavity spectrum.
2) A Fano resonance suppresses Stokes scattering and improves cooling of the membrane. Many physical systems could exhibit these interference effects, including photonic crystal membranes, atom arrays, and excitons in semiconductors.
3) Functionalized membranes have applications in cavity optomechanics and cavity QED such as improved cooling and serving as an end mirror with strong coupling.

Gaussian control and readout of levitated nanoparticles via coherent scattering

Gaussian control and readout of levitated nanoparticles via coherent scattering

Measurement-induced long-distance entanglement of superconducting qubits usin...

Measurement-induced long-distance entanglement of superconducting qubits usin...

￼FAST実験2：新型大気蛍光望遠鏡の性能評価

￼FAST実験2：新型大気蛍光望遠鏡の性能評価

FINE CHARACTERIZATION OF NANOSCALE MATERIALS BY TEM METHODS

FINE CHARACTERIZATION OF NANOSCALE MATERIALS BY TEM METHODS

Improved optomechanical interactions for quantum technologies

Improved optomechanical interactions for quantum technologies

Implementation of Radon Transformation for Electrical Impedance Tomography (E...

Implementation of Radon Transformation for Electrical Impedance Tomography (E...

Implementation of Radon Transformation for Electrical Impedance Tomography (EIT)

Implementation of Radon Transformation for Electrical Impedance Tomography (EIT)

Modeling organic electronics with ADF

Modeling organic electronics with ADF

Motional Gaussian states and gates for a levitating particle

Motional Gaussian states and gates for a levitating particle

Novel approaches to optomechanical transduction

Novel approaches to optomechanical transduction

Measurement-induced long-distance entanglement of superconducting qubits usin...

Measurement-induced long-distance entanglement of superconducting qubits usin...

First results from a prototype for the Fluorescence detector Array of Single-...

First results from a prototype for the Fluorescence detector Array of Single-...

Angular and position stability of a nanorod trapped in an optical tweezers

Angular and position stability of a nanorod trapped in an optical tweezers

Publication

Publication

The FAST Project - Next Generation UHECR Observatory -

The FAST Project - Next Generation UHECR Observatory -

PHYSICS.pdf

PHYSICS.pdf

Automatic eye fixations identification based on analysis of variance and cova...

Automatic eye fixations identification based on analysis of variance and cova...

Observing ultra-high energy cosmic rays with prototypes of the Fluorescence d...

Observing ultra-high energy cosmic rays with prototypes of the Fluorescence d...

Ion-acoustic rogue waves in multi-ion plasmas

Ion-acoustic rogue waves in multi-ion plasmas

Interference effects in cavity optomechanics with hybridized membranes

Interference effects in cavity optomechanics with hybridized membranes

Transformations of continuous-variable entangled states of light

Gaussian states and Gaussian transformations represent an interesting counterpart to two-level photonic systems in the field of quantum information processing. On the theoretical side, Gaussian states are easily described using first and second moments of the quadrature operators; from the experimental point of view, Gaussian operations can be implemented using linear optics and optical parametric amplifiers. The biggest advantage compared to two-level photonic systems, is deterministic generation of entangled states in parametric amplifiers and highly efficient homodyne detection. In this presentation, we propose new protocols for manipulation of entanglement of Gaussian states.
Firstly, we study entanglement concentration of split single-mode squeezed vacuum states by photon subtraction enhanced by local coherent displacements. These states can be obtained by mixing a single-mode squeezed vacuum state with vacuum on a beam splitter and are, therefore, generated more easily than two-mode squeezed vacuum states. We show that performing local coherent displacements prior to photon subtraction can lead to an enhancement of the output entanglement. This is seen in weak-squeezing approximation where destructive quantum interference of dominant Fock states occurs, while for arbitrarily squeezed input states, we analyze a realistic scenario, including limited transmittance of tap-off beam splitters and limited efficiency of heralding detectors.
Next, motivated by results obtained for bipartite Gaussian states, we study symmetrization of multipartite Gaussian states by local Gaussian operations. Namely, we analyze strategies based on addition of correlated noise and on quantum non-demolition interaction. We use fidelity of assisted quantum teleportation as a figure of merit to characterize entanglement of the state before and after the symmetrization procedure. Analyzing the teleportation protocol and considering more general transformations of multipartite Gaussian states, we show that the fidelity can be improved significantly.

Entangling distant superconducting qubits using nanomechanical transducers

Optical fields are ideal for transmission of quantum information due to low losses and high repetition rates. Microwave fields, on the other hand, can be used to manipulate superconducting systems that belong among the most promising candidates for quantum computing architecture. A device enabling conversion between electromagnetic fields of such distinct frequencies would thus represent a basic building block of future quantum computer networks. Nanomechanical oscillators represent an extremely suitable platform for this task as they can couple to both optical and microwave fields. The electromechanical interaction is achieved through capacitance of an LC circuit, where the change of voltage couples to the position of a mechanical membrane forming one plate of the capacitor, while coupling to the visible light is due to radiation pressure from light reflected off the membrane.
Here we study how such nanomechanical transducers can be employed to generate entanglement between two superconducting qubits placed on two separate chips. Our protocol is based on continuous Bell measurement of the outgoing light fields and applying feedback on the qubits. With such a setup, it is, in principle, possible to generate entanglement between qubits deterministically in the steady state.

Novel approaches to optomechanical transduction

In recent years, mechanical oscillators received attention as a promising tool for frequency conversion between microwaves and light. A general, bi-directional transducer with high efficiency is still far from reach of current technology; finding new strategies for optomechanical transduction allows us to relax the requirements and bring these systems closer to an experimental realization. An interesting example is generation of entanglement between two superconducting qubits using measurement and postselection. Here, the mechanical oscillators interacts directly with the superconducting transmon qubit in such a way that it feels a qubit-state dependent force. This force can then be read out using a cavity field; reading out two such systems sequentially realizes an effective total spin measurement. Starting from a suitable initial state and employing postselection, entanglement can be generated. Another interesting approach is to use an array of optomechanical transducers in which the output fields of one transducer are fed into the input of the next. The periodicity of the array results in a joint dispersion relation for the propagating microwave and optical fields. The resulting structure can be used to control the conversion bandwidth and forward and backward scattering.

Displacement-enhanced continuous-variable entanglement concentration

We study entanglement concentration of continuous variable Gaussian states by local photon subtractions enhanced by coherent displacements. Instead of the previously considered symmetric two-mode squeezed vacuum states, we investigate the protocol for input states in the form of split single-mode squeezed vacuum, i.e., states obtained by mixing a single-mode squeezed vacuum with a vacuum state on a beam splitter, which is an experimentally highly relevant configuration. We analyze two scenarios in which the displacement-enhanced photon subtraction is performed either only on one, or on both of the modes and show that local displacements can lead to improved performance of the concentration protocol.

Spatially adiabatic frequency conversion in opto-electro-mechanical arrays

Optoelectromechanical systems offer a promising route towards frequency conversion between microwaves and light and towards building quantum networks of superconducting circuits. Current theoretical and experimental efforts focus on approaches based on either optomechanically induced transparency or adiabatic passage. The former has the advantage of working with time-independent control but only in a limited bandwidth (typically much smaller than the cavity linewidth); the latter can, in principle, be used to increase the bandwidth but at the expense of working with time-dependent control fields and with strong optomechanical coupling. In my presentation, I will show that an array of optoelectromechanical transducers can overcome this limitation and reach a bandwidth that is larger than the cavity linewidth. The coupling rates are varied in space throughout the array so that a mechanically dark mode of the propagating fields adiabatically changes from microwave to optical or vice versa. This strategy also leads to significantly reduced thermal noise with the collective optomechanical cooperativity being the relevant figure of merit. I will also demonstrate that, remarkably, the bandwidth enhancement per transducer element is largest for small arrays. With these features the scheme is particularly relevant for improving the conversion bandwidth in state-of-the-art experimental setups.

Cavity optomechanics with variable polarizability mirrors

Cavity optomechanics with frequency-independent high-reflectivity mirrors shows different operation regimes distinguished by the ratio of the mechanical frequency and the photon loss rate. Working in the resolved-sideband regime thus enables cooling or amplification of the mechanical motion while optomechanical systems in the bad-cavity limit can be used to efficiently measure the mechanical motion. The use of mirrors with frequency-dependent reflectivity can bring new, interesting effects, such as Doppler cooling of the mechanical motion or modification of the sideband ratio. Here, we develop a full quantum theory of cavity optomechanics where the mechanically compliant mirror has reflectivity that strongly depends on the frequency of the incident light and identify regimes where these new optomechanical effects can be observed. These results are relevant for mirrors formed by self-assembled two-dimensional atomic layers, where the reflectivity is sharply peaked around the internal resonance of the atoms, or for structured membranes with engineered spatial defects.

Interference effects in doped cavity optomechanics

Radiation pressure forces in cavity optomechanics allow for efficient cooling of vibrational modes of macroscopic mechanical resonators, the manipulation of their quantum states, as well as generation of optomechanical entanglement. The standard mechanism relies on the cavity photons directly modifying the state of the mechanical resonator. Hybrid cavity optomechanics provides an alternative approach by coupling mechanical objects to quantum emitters, either directly or indirectly via the common interaction with a cavity field mode. While many approaches exist, they typically share a simple effective description in terms of a single force acting on the mechanical resonator. More generally, one can study the interplay between various forces acting on the mechanical resonator in such hybrid mechanical devices. This interplay can lead to interference effects that may, for instance, improve cooling of the mechanical motion or lead to generation of entanglement between various parts of the hybrid device. Here, we provide such an example of a hybrid optomechanical system where an ensemble of quantum emitters is embedded into the mechanical resonator formed by a vibrating membrane. The interference between the radiation pressure force and the mechanically modulated Tavis--Cummings interaction leads to enhanced cooling dynamics in regimes in which neither force is efficient by itself. Our results pave the way towards engineering novel optomechanical interactions in hybrid optomechanical systems.

Transformations of continuous-variable entangled states of light

Transformations of continuous-variable entangled states of light

Entangling distant superconducting qubits using nanomechanical transducers

Entangling distant superconducting qubits using nanomechanical transducers

Measurement-induced long-distance entanglement of superconducting qubits usin...

Novel approaches to optomechanical transduction

Novel approaches to optomechanical transduction

Displacement-enhanced continuous-variable entanglement concentration

Displacement-enhanced continuous-variable entanglement concentration

Spatially adiabatic frequency conversion in opto-electro-mechanical arrays

Spatially adiabatic frequency conversion in opto-electro-mechanical arrays

Cavity optomechanics with variable polarizability mirrors

Cavity optomechanics with variable polarizability mirrors

Interference effects in doped cavity optomechanics

Interference effects in doped cavity optomechanics

CLASS 12th CHEMISTRY SOLID STATE ppt (Animated)

Description:
Dive into the fascinating realm of solid-state physics with our meticulously crafted online PowerPoint presentation. This immersive educational resource offers a comprehensive exploration of the fundamental concepts, theories, and applications within the realm of solid-state physics.
From crystalline structures to semiconductor devices, this presentation delves into the intricate principles governing the behavior of solids, providing clear explanations and illustrative examples to enhance understanding. Whether you're a student delving into the subject for the first time or a seasoned researcher seeking to deepen your knowledge, our presentation offers valuable insights and in-depth analyses to cater to various levels of expertise.
Key topics covered include:
Crystal Structures: Unravel the mysteries of crystalline arrangements and their significance in determining material properties.
Band Theory: Explore the electronic band structure of solids and understand how it influences their conductive properties.
Semiconductor Physics: Delve into the behavior of semiconductors, including doping, carrier transport, and device applications.
Magnetic Properties: Investigate the magnetic behavior of solids, including ferromagnetism, antiferromagnetism, and ferrimagnetism.
Optical Properties: Examine the interaction of light with solids, including absorption, reflection, and transmission phenomena.
With visually engaging slides, informative content, and interactive elements, our online PowerPoint presentation serves as a valuable resource for students, educators, and enthusiasts alike, facilitating a deeper understanding of the captivating world of solid-state physics. Explore the intricacies of solid-state materials and unlock the secrets behind their remarkable properties with our comprehensive presentation.

Farming systems analysis: what have we learnt?.pptx

Presentation given at the official farewell of Prof Ken Gillet at Wageningen on 13 June 2024

ESA/ACT Science Coffee: Diego Blas - Gravitational wave detection with orbita...

ESA/ACT Science Coffee: Diego Blas - Gravitational wave detection with orbita...Advanced-Concepts-Team

Presentation in the Science Coffee of the Advanced Concepts Team of the European Space Agency on the 07.06.2024.
Speaker: Diego Blas (IFAE/ICREA)
Title: Gravitational wave detection with orbital motion of Moon and artificial
Abstract:
In this talk I will describe some recent ideas to find gravitational waves from supermassive black holes or of primordial origin by studying their secular effect on the orbital motion of the Moon or satellites that are laser ranged.快速办理(UAM毕业证书)马德里自治大学毕业证学位证一模一样

学校原件一模一样【微信：741003700 】《(UAM毕业证书)马德里自治大学毕业证学位证》【微信：741003700 】学位证，留信认证（真实可查，永久存档）原件一模一样纸张工艺/offer、雅思、外壳等材料/诚信可靠,可直接看成品样本，帮您解决无法毕业带来的各种难题！外壳，原版制作，诚信可靠，可直接看成品样本。行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备。十五年致力于帮助留学生解决难题，包您满意。
本公司拥有海外各大学样板无数，能完美还原。
1:1完美还原海外各大学毕业材料上的工艺：水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠。文字图案浮雕、激光镭射、紫外荧光、温感、复印防伪等防伪工艺。材料咨询办理、认证咨询办理请加学历顾问Q/微741003700
【主营项目】
一.毕业证【q微741003700】成绩单、使馆认证、教育部认证、雅思托福成绩单、学生卡等！
二.真实使馆公证(即留学回国人员证明,不成功不收费)
三.真实教育部学历学位认证（教育部存档！教育部留服网站永久可查）
四.办理各国各大学文凭(一对一专业服务,可全程监控跟踪进度)
如果您处于以下几种情况：
◇在校期间，因各种原因未能顺利毕业……拿不到官方毕业证【q/微741003700】
◇面对父母的压力，希望尽快拿到；
◇不清楚认证流程以及材料该如何准备；
◇回国时间很长，忘记办理；
◇回国马上就要找工作，办给用人单位看；
◇企事业单位必须要求办理的
◇需要报考公务员、购买免税车、落转户口
◇申请留学生创业基金
留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才

HOW DO ORGANISMS REPRODUCE?reproduction part 1

reproduction part 1
class 10 ncert

JAMES WEBB STUDY THE MASSIVE BLACK HOLE SEEDS

The pathway(s) to seeding the massive black holes (MBHs) that exist at the heart of galaxies in the present and distant Universe remains an unsolved problem. Here we categorise, describe and quantitatively discuss the formation pathways of both light and heavy seeds. We emphasise that the most recent computational models suggest that rather than a bimodal-like mass spectrum between light and heavy seeds with light at one end and heavy at the other that instead a continuum exists. Light seeds being more ubiquitous and the heavier seeds becoming less and less abundant due the rarer environmental conditions required for their formation. We therefore examine the different mechanisms that give rise to different seed mass spectrums. We show how and why the mechanisms that produce the heaviest seeds are also among the rarest events in the Universe and are hence extremely unlikely to be the seeds for the vast majority of the MBH population. We quantify, within the limits of the current large uncertainties in the seeding processes, the expected number densities of the seed mass spectrum. We argue that light seeds must be at least 103 to 105 times more numerous than heavy seeds to explain the MBH population as a whole. Based on our current understanding of the seed population this makes heavy seeds (Mseed > 103 M⊙) a significantly more likely pathway given that heavy seeds have an abundance pattern than is close to and likely in excess of 10−4 compared to light seeds. Finally, we examine the current state-of-the-art in numerical calculations and recent observations and plot a path forward for near-future advances in both domains.

23PH301 - Optics - Optical Lenses.pptx

Under graduate Physics - Optics

Microbiology of Central Nervous System INFECTIONS.pdf

Microbiology of CNS infection

Summary Of transcription and Translation.pdf

Hello Everyone Here We are Sharing You with The process of protien Synthesis in very short points you will be Able to understand It Very well

Immersive Learning That Works: Research Grounding and Paths Forward

We will metaverse into the essence of immersive learning, into its three dimensions and conceptual models. This approach encompasses elements from teaching methodologies to social involvement, through organizational concerns and technologies. Challenging the perception of learning as knowledge transfer, we introduce a 'Uses, Practices & Strategies' model operationalized by the 'Immersive Learning Brain' and ‘Immersion Cube’ frameworks. This approach offers a comprehensive guide through the intricacies of immersive educational experiences and spotlighting research frontiers, along the immersion dimensions of system, narrative, and agency. Our discourse extends to stakeholders beyond the academic sphere, addressing the interests of technologists, instructional designers, and policymakers. We span various contexts, from formal education to organizational transformation to the new horizon of an AI-pervasive society. This keynote aims to unite the iLRN community in a collaborative journey towards a future where immersive learning research and practice coalesce, paving the way for innovative educational research and practice landscapes.

在线办理(salfor毕业证书)索尔福德大学毕业证毕业完成信一模一样

学校原件一模一样【微信：741003700 】《(salfor毕业证书)索尔福德大学毕业证》【微信：741003700 】学位证，留信认证（真实可查，永久存档）原件一模一样纸张工艺/offer、雅思、外壳等材料/诚信可靠,可直接看成品样本，帮您解决无法毕业带来的各种难题！外壳，原版制作，诚信可靠，可直接看成品样本。行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备。十五年致力于帮助留学生解决难题，包您满意。
本公司拥有海外各大学样板无数，能完美还原。
1:1完美还原海外各大学毕业材料上的工艺：水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠。文字图案浮雕、激光镭射、紫外荧光、温感、复印防伪等防伪工艺。材料咨询办理、认证咨询办理请加学历顾问Q/微741003700
【主营项目】
一.毕业证【q微741003700】成绩单、使馆认证、教育部认证、雅思托福成绩单、学生卡等！
二.真实使馆公证(即留学回国人员证明,不成功不收费)
三.真实教育部学历学位认证（教育部存档！教育部留服网站永久可查）
四.办理各国各大学文凭(一对一专业服务,可全程监控跟踪进度)
如果您处于以下几种情况：
◇在校期间，因各种原因未能顺利毕业……拿不到官方毕业证【q/微741003700】
◇面对父母的压力，希望尽快拿到；
◇不清楚认证流程以及材料该如何准备；
◇回国时间很长，忘记办理；
◇回国马上就要找工作，办给用人单位看；
◇企事业单位必须要求办理的
◇需要报考公务员、购买免税车、落转户口
◇申请留学生创业基金
留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才

Describing and Interpreting an Immersive Learning Case with the Immersion Cub...

Current descriptions of immersive learning cases are often difficult or impossible to compare. This is due to a myriad of different options on what details to include, which aspects are relevant, and on the descriptive approaches employed. Also, these aspects often combine very specific details with more general guidelines or indicate intents and rationales without clarifying their implementation. In this paper we provide a method to describe immersive learning cases that is structured to enable comparisons, yet flexible enough to allow researchers and practitioners to decide which aspects to include. This method leverages a taxonomy that classifies educational aspects at three levels (uses, practices, and strategies) and then utilizes two frameworks, the Immersive Learning Brain and the Immersion Cube, to enable a structured description and interpretation of immersive learning cases. The method is then demonstrated on a published immersive learning case on training for wind turbine maintenance using virtual reality. Applying the method results in a structured artifact, the Immersive Learning Case Sheet, that tags the case with its proximal uses, practices, and strategies, and refines the free text case description to ensure that matching details are included. This contribution is thus a case description method in support of future comparative research of immersive learning cases. We then discuss how the resulting description and interpretation can be leveraged to change immersion learning cases, by enriching them (considering low-effort changes or additions) or innovating (exploring more challenging avenues of transformation). The method holds significant promise to support better-grounded research in immersive learning.

Sexuality - Issues, Attitude and Behaviour - Applied Social Psychology - Psyc...

A proprietary approach developed by bringing together the best of learning theories from Psychology, design principles from the world of visualization, and pedagogical methods from over a decade of training experience, that enables you to: Learn better, faster!

Candidate young stellar objects in the S-cluster: Kinematic analysis of a sub...

Context. The observation of several L-band emission sources in the S cluster has led to a rich discussion of their nature. However, a definitive answer to the classification of the dusty objects requires an explanation for the detection of compact Doppler-shifted Brγ emission. The ionized hydrogen in combination with the observation of mid-infrared L-band continuum emission suggests that most of these sources are embedded in a dusty envelope. These embedded sources are part of the S-cluster, and their relationship to the S-stars is still under debate. To date, the question of the origin of these two populations has been vague, although all explanations favor migration processes for the individual cluster members. Aims. This work revisits the S-cluster and its dusty members orbiting the supermassive black hole SgrA* on bound Keplerian orbits from a kinematic perspective. The aim is to explore the Keplerian parameters for patterns that might imply a nonrandom distribution of the sample. Additionally, various analytical aspects are considered to address the nature of the dusty sources. Methods. Based on the photometric analysis, we estimated the individual H−K and K−L colors for the source sample and compared the results to known cluster members. The classification revealed a noticeable contrast between the S-stars and the dusty sources. To fit the flux-density distribution, we utilized the radiative transfer code HYPERION and implemented a young stellar object Class I model. We obtained the position angle from the Keplerian fit results; additionally, we analyzed the distribution of the inclinations and the longitudes of the ascending node. Results. The colors of the dusty sources suggest a stellar nature consistent with the spectral energy distribution in the near and midinfrared domains. Furthermore, the evaporation timescales of dusty and gaseous clumps in the vicinity of SgrA* are much shorter ( 2yr) than the epochs covered by the observations (≈15yr). In addition to the strong evidence for the stellar classification of the D-sources, we also find a clear disk-like pattern following the arrangements of S-stars proposed in the literature. Furthermore, we find a global intrinsic inclination for all dusty sources of 60 ± 20◦, implying a common formation process. Conclusions. The pattern of the dusty sources manifested in the distribution of the position angles, inclinations, and longitudes of the ascending node strongly suggests two different scenarios: the main-sequence stars and the dusty stellar S-cluster sources share a common formation history or migrated with a similar formation channel in the vicinity of SgrA*. Alternatively, the gravitational influence of SgrA* in combination with a massive perturber, such as a putative intermediate mass black hole in the IRS 13 cluster, forces the dusty objects and S-stars to follow a particular orbital arrangement. Key words. stars: black holes– stars: formation– Galaxy: center– galaxies: star formation

EWOCS-I: The catalog of X-ray sources in Westerlund 1 from the Extended Weste...

Context. With a mass exceeding several 104 M⊙ and a rich and dense population of massive stars, supermassive young star clusters
represent the most massive star-forming environment that is dominated by the feedback from massive stars and gravitational interactions
among stars.
Aims. In this paper we present the Extended Westerlund 1 and 2 Open Clusters Survey (EWOCS) project, which aims to investigate
the influence of the starburst environment on the formation of stars and planets, and on the evolution of both low and high mass stars.
The primary targets of this project are Westerlund 1 and 2, the closest supermassive star clusters to the Sun.
Methods. The project is based primarily on recent observations conducted with the Chandra and JWST observatories. Specifically,
the Chandra survey of Westerlund 1 consists of 36 new ACIS-I observations, nearly co-pointed, for a total exposure time of 1 Msec.
Additionally, we included 8 archival Chandra/ACIS-S observations. This paper presents the resulting catalog of X-ray sources within
and around Westerlund 1. Sources were detected by combining various existing methods, and photon extraction and source validation
were carried out using the ACIS-Extract software.
Results. The EWOCS X-ray catalog comprises 5963 validated sources out of the 9420 initially provided to ACIS-Extract, reaching a
photon flux threshold of approximately 2 × 10−8 photons cm−2
s
−1
. The X-ray sources exhibit a highly concentrated spatial distribution,
with 1075 sources located within the central 1 arcmin. We have successfully detected X-ray emissions from 126 out of the 166 known
massive stars of the cluster, and we have collected over 71 000 photons from the magnetar CXO J164710.20-455217.

Randomised Optimisation Algorithms in DAPHNE

Slides from talk:
Aleš Zamuda: Randomised Optimisation Algorithms in DAPHNE .
Austrian-Slovenian HPC Meeting 2024 – ASHPC24, Seeblickhotel Grundlsee in Austria, 10–13 June 2024
https://ashpc.eu/

Compexometric titration/Chelatorphy titration/chelating titration

Classification
Metal ion ion indicators
Masking and demasking reagents
Estimation of Magnisium sulphate
Calcium gluconate
Complexometric Titration/ chelatometry titration/chelating titration, introduction, Types-
1.Direct Titration
2.Back Titration
3.Replacement Titration
4.Indirect Titration
Masking agent, Demasking agents
formation of complex
comparition between masking and demasking agents,
Indicators/Metal ion indicators/ Metallochromic indicators/pM indicators,
Visual Technique,PM indicators (metallochromic), Indicators of pH, Redox Indicators
Instrumental Techniques-Photometry
Potentiometry
Miscellaneous methods.
Complex titration with EDTA.

MICROBIAL INTERACTION PPT/ MICROBIAL INTERACTION AND THEIR TYPES // PLANT MIC...

MICROBIAL INTERACTION PPT/ MICROBIAL INTERACTION AND THEIR TYPES // PLANT MIC...ABHISHEK SONI NIMT INSTITUTE OF MEDICAL AND PARAMEDCIAL SCIENCES , GOVT PG COLLEGE NOIDA

Microbial interaction
Microorganisms interacts with each other and can be physically associated with another organisms in a variety of ways.
One organism can be located on the surface of another organism as an ectobiont or located within another organism as endobiont.
Microbial interaction may be positive such as mutualism, proto-cooperation, commensalism or may be negative such as parasitism, predation or competition
Types of microbial interaction
Positive interaction: mutualism, proto-cooperation, commensalism
Negative interaction: Ammensalism (antagonism), parasitism, predation, competition
I. Mutualism:
It is defined as the relationship in which each organism in interaction gets benefits from association. It is an obligatory relationship in which mutualist and host are metabolically dependent on each other.
Mutualistic relationship is very specific where one member of association cannot be replaced by another species.
Mutualism require close physical contact between interacting organisms.
Relationship of mutualism allows organisms to exist in habitat that could not occupied by either species alone.
Mutualistic relationship between organisms allows them to act as a single organism.
Examples of mutualism:
i. Lichens:
Lichens are excellent example of mutualism.
They are the association of specific fungi and certain genus of algae. In lichen, fungal partner is called mycobiont and algal partner is called
II. Syntrophism:
It is an association in which the growth of one organism either depends on or improved by the substrate provided by another organism.
In syntrophism both organism in association gets benefits.
Compound A
Utilized by population 1
Compound B
Utilized by population 2
Compound C
utilized by both Population 1+2
Products
In this theoretical example of syntrophism, population 1 is able to utilize and metabolize compound A, forming compound B but cannot metabolize beyond compound B without co-operation of population 2. Population 2is unable to utilize compound A but it can metabolize compound B forming compound C. Then both population 1 and 2 are able to carry out metabolic reaction which leads to formation of end product that neither population could produce alone.
Examples of syntrophism:
i. Methanogenic ecosystem in sludge digester
Methane produced by methanogenic bacteria depends upon interspecies hydrogen transfer by other fermentative bacteria.
Anaerobic fermentative bacteria generate CO2 and H2 utilizing carbohydrates which is then utilized by methanogenic bacteria (Methanobacter) to produce methane.
ii. Lactobacillus arobinosus and Enterococcus faecalis:
In the minimal media, Lactobacillus arobinosus and Enterococcus faecalis are able to grow together but not alone.
The synergistic relationship between E. faecalis and L. arobinosus occurs in which E. faecalis require folic acid
CLASS 12th CHEMISTRY SOLID STATE ppt (Animated)

CLASS 12th CHEMISTRY SOLID STATE ppt (Animated)

Farming systems analysis: what have we learnt?.pptx

Farming systems analysis: what have we learnt?.pptx

ESA/ACT Science Coffee: Diego Blas - Gravitational wave detection with orbita...

ESA/ACT Science Coffee: Diego Blas - Gravitational wave detection with orbita...

快速办理(UAM毕业证书)马德里自治大学毕业证学位证一模一样

快速办理(UAM毕业证书)马德里自治大学毕业证学位证一模一样

Tissue fluids_etiology_volume regulation_pressure.pptx

Tissue fluids_etiology_volume regulation_pressure.pptx

HOW DO ORGANISMS REPRODUCE?reproduction part 1

HOW DO ORGANISMS REPRODUCE?reproduction part 1

JAMES WEBB STUDY THE MASSIVE BLACK HOLE SEEDS

JAMES WEBB STUDY THE MASSIVE BLACK HOLE SEEDS

cathode ray oscilloscope and its applications

cathode ray oscilloscope and its applications

23PH301 - Optics - Optical Lenses.pptx

23PH301 - Optics - Optical Lenses.pptx

Microbiology of Central Nervous System INFECTIONS.pdf

Microbiology of Central Nervous System INFECTIONS.pdf

Summary Of transcription and Translation.pdf

Summary Of transcription and Translation.pdf

Immersive Learning That Works: Research Grounding and Paths Forward

Immersive Learning That Works: Research Grounding and Paths Forward

在线办理(salfor毕业证书)索尔福德大学毕业证毕业完成信一模一样

在线办理(salfor毕业证书)索尔福德大学毕业证毕业完成信一模一样

Describing and Interpreting an Immersive Learning Case with the Immersion Cub...

Describing and Interpreting an Immersive Learning Case with the Immersion Cub...

Sexuality - Issues, Attitude and Behaviour - Applied Social Psychology - Psyc...

Sexuality - Issues, Attitude and Behaviour - Applied Social Psychology - Psyc...

Candidate young stellar objects in the S-cluster: Kinematic analysis of a sub...

Candidate young stellar objects in the S-cluster: Kinematic analysis of a sub...

EWOCS-I: The catalog of X-ray sources in Westerlund 1 from the Extended Weste...

EWOCS-I: The catalog of X-ray sources in Westerlund 1 from the Extended Weste...

Randomised Optimisation Algorithms in DAPHNE

Randomised Optimisation Algorithms in DAPHNE

Compexometric titration/Chelatorphy titration/chelating titration

Compexometric titration/Chelatorphy titration/chelating titration

MICROBIAL INTERACTION PPT/ MICROBIAL INTERACTION AND THEIR TYPES // PLANT MIC...

MICROBIAL INTERACTION PPT/ MICROBIAL INTERACTION AND THEIR TYPES // PLANT MIC...

- 1. Controlling the motion of levitated particles by coherent scattering Ondřej Černotík, Iivari Pietikäinen, Anil Kumar, and Radim Filip Department of Optics, Palacký University Olomouc, Czechia APS March Meeting, March 3, 2020 @cernotik
- 2. Ondrej Cernotík: Controlling the motion of levitated particles by coherent scatteringˇˇ @cernotik Optical levitation allows for high-quality mechanical motion without damping. 2 Nonspherical particles S. Kuhn et al., Optica 4, 356 (2017) Hybrid systems L.P. Neukirch et al., Nat. Photon. 9, 653 (2015) Cavity optomechanics N. Kiesel, PNAS 110, 14180 (2013) Thermodynamics I.A. Martinez et al., Nat. Phys. 12, 67 (2016)
- 3. Ondrej Cernotík: Controlling the motion of levitated particles by coherent scatteringˇˇ @cernotik Coherent scattering is a new, powerful tool for optomechanical interactions. 3 U. Delic et al., PRL 122, 123602 (2019) D. Windey et al., PRL 122, 123601 (2019) U. Delic et al., Science 367, 892 (2020)
- 4. Ondrej Cernotík: Controlling the motion of levitated particles by coherent scatteringˇˇ @cernotik The system is versatile, allowing one-, two-, and three- dimensional coupling. 4 C. Gonzalez-Ballestero et al., PRA 100, 013805 (2019) Intracavity intensity Radial coupling Axial coupling Polarization Etw<latexit sha1_base64="bRQQNOEkJg9znsC3zqgs56MYHpg=">AAACH3icbVDLSsNAFJ3UV42vqks3wSK4kJLEoi5LRXRZxT6gDWUynbRDJw9mbtQS8idu/BU3LhQRd/0bp2kX2nrgwuHcx5w5bsSZBNMca7ml5ZXVtfy6vrG5tb1T2N1ryDAWhNZJyEPRcrGknAW0Dgw4bUWCYt/ltOkOLyf95gMVkoXBPYwi6vi4HzCPEQxK6hbOOkCfILvTvruuOoltmye2basqp4ne8TEMXC+5SrsZFX4Cj6medgtFs2RmMBaJNSNFNEOtW/ju9EIS+zQAwrGUbcuMwEmwAEY4TfVOLGmEyRD3aVvRAPtUOknmKzWOlNIzvFCoCsDI1N8bCfalHPmumpyYlPO9ifhfrx2Dd+EkLIhioAGZPuTF3IDQmIRl9JigBPhIEUwEU14NMsACE1CR6ioEa/7Li6Rhl6zTkn1bLlaqszjy6AAdomNkoXNUQTeohuqIoGf0it7Rh/aivWmf2td0NKfNdvbRH2jjH0y5oe4=</latexit> Ecav<latexit sha1_base64="nvRiBR5yCYIOD0X3nzXvyGTc6/c=">AAACIHicbVDLSsNAFJ3UV42vqks3wSK4kJLEQl2Wiuiyin1AG8pkOmmHTh7M3BRLyKe48VfcuFBEd/o1TtMutPXAhcO5jzlz3IgzCab5peVWVtfWN/Kb+tb2zu5eYf+gKcNYENogIQ9F28WSchbQBjDgtB0Jin2X05Y7upz2W2MqJAuDe5hE1PHxIGAeIxiU1CtUukAfILvTubuuOYltm2e2basqp4ne9TEMXS+5SnsZFX5C8DjV016haJbMDMYyseakiOao9wqf3X5IYp8GQDiWsmOZETgJFsAIp6nejSWNMBnhAe0oGmCfSifJjKXGiVL6hhcKVQEYmfp7I8G+lBPfVZNTl3KxNxX/63Vi8C6chAVRDDQgs4e8mBsQGtO0jD4TlACfKIKJYMqrQYZYYAIqU12FYC1+eZk07ZJ1XrJvy8VqbR5HHh2hY3SKLFRBVXSD6qiBCHpEz+gVvWlP2ov2rn3MRnPafOcQ/YH2/QP8tqJH</latexit> Hint ∝ Ecav(r) ⋅ Etw(r) ≃ − (λxx + λyy)(c + c† ) − iλzz(c − c† )
- 5. Ondrej Cernotík: Controlling the motion of levitated particles by coherent scatteringˇˇ @cernotik We are interested in generating one-mode mechanical squeezing. 5 ·c = − (κ + iΔ)c + iλx + 2κcin ·x = ωmp ·p = − ωmx − γp + λ(c + c† ) + ξ H = ωm 2 (x2 + p2 ) + Δc† c − λ(c + c† )x
- 6. Ondrej Cernotík: Controlling the motion of levitated particles by coherent scatteringˇˇ @cernotik Strong squeezing can be generated with a modulated trapping beam. 6 OC, R. Filip, PRResearch 2, 013052 (2020)ˇ tweezer amplitudeEtw(t) = E0[1 + α cos(2ωmt + ϕ)] H = Δc† c + ωm 2 p2 + ωm 2 [1 + α cos(2ωmt + ϕ)]2 x2 −λ[1 + α cos(2ωmt + ϕ)](c + c† )x
- 7. Ondrej Cernotík: Controlling the motion of levitated particles by coherent scatteringˇˇ @cernotik Strong squeezing can be generated with a modulated trapping beam. 7 OC, R. Filip, PRResearch 2, 013052 (2020)ˇ transient regime, Δ ≫ λ, κ, ωm parametric squeezing steady state, Δ = ωm dissipative and parametric squeezing
- 8. Ondrej Cernotík: Controlling the motion of levitated particles by coherent scatteringˇˇ @cernotik Extensions and applications of this scheme are possible. 8 • Towards full control of motion of a levitated particle • Mechanical squeezing for force sensing J. Gieseler et al., Nat. Phys. 9, 806 (2013) • Parametric and dissipative two-mode squeezing A. Pontin et al., PRL 116, 103601 (2016) C.F. Ockeloen-Korppi et al., Nature 556, 478 (2018) • Analysis beyond RWA I. Pietikäinen, OC, R. Filip, arXiv:2002.xxxxx Talk by Iivari: M02.00008, Wednesday, 12:39 PM, room 105
- 9. Ondrej Cernotík: Controlling the motion of levitated particles by coherent scatteringˇˇ @cernotik Coherent scattering allows versatile interactions with multiple particles. 9 H = − (λ1b1 + λ2b† 2 )c† − (λ1b† 1 + λ2b2)c
- 10. Ondrej Cernotík: Controlling the motion of levitated particles by coherent scatteringˇˇ @cernotik Coherent scattering is a powerful tool for levitated optomechanics. 10 • Multiparticle dynamics via coherent scattering A. Kumar, OC, R. Filip, in preparationˇ • Mechanical squeezing for force sensing • Towards full control of motion of a levitated particle OC, R. Filip, PRResearch 2, 013052 (2020)ˇ • Mechanical squeezing for force sensing • Analysis beyond RWA I. Pietikäinen, OC, R. Filip, arXiv:2002.xxxxx Talk by Iivari: M02.00008, Wednesday, 12:39 PM, room 105 ˇ