The document presents information on quantum computing and the potential of quantum computers. It discusses how quantum computers make use of quantum mechanics, quantum bits, quantum gates, and quantum parallelism. While several prototypes have been built, significant technical challenges remain before a large-scale, general-purpose quantum computer can be realized. The document suggests that a practical quantum computer may still be decades away.

1. THE HOLY GRAIL OF SCIENCE!
PRESENTED BY : DHANITH KRISHNA.B
&
SABEER SHA . S
S1S2-CS , MCET
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4. Computing governed by Quantum mechanics.
Makes use of Quantum Entanglement and Superposition.
Basic building block is a Quantum bit (Qubit)
Bit Qubit
Quantum
Superposition
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5. Decoherence
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6. Decoherence
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8. 100 011
Quantum
110 101
F(x)
001 000
Processor
100 111
Input Output
 We make simple Quantum gates and connect them to form
Quantum networks.
 Quantum gates support certain new operations in addition to
classical computational operations.
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9. Design Realizations
Proposed Quantum Computer DiVincenzo Criteria
Architectures:
Computer uses accurate quantum gates and
quantum logic.
Physically scalable (Qubits can be increased).
Qubits can be initialized to some values.
Has means of reading Qubits.
Operates much faster than Decoherence
time.
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10. •A Qubit register of L •Faster switching. •Supports entirely new
Qubits are equivalent •Quantum Computers algorithms with no
to 2L classical registers consume lesser classical analogs.
operating in parallel. energy.
•2L computations per
single step.
Quantum Quantum
Efficiency
Parallelism Algorithms
•True Randomness •Every object in this •Simulation helps in
helps in various universe , in some drug development.
cryptographic sense is a Quantum •Simulation helps in
purposes. computer. study of Quantum
•CYBORGs could be Mechanics.
made.
True Artificial Molecular
Randomness Intelligence Simulation
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11. Theoretician's dream
Need of
technologies for Problem of
better scaling & Decoherence.
Interconnection.
Need for
advancement in Quantum Error
Nanotechnology Handling and
& Quantum Gate accuracy.
software's.
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12. NMR based Dwave
two Qubit – Vesuvius
Peter Shor's Computer. computer
first (512
Quantum Qubit).
Deutsch's Algorithm.
Universal
Quantum
Richard Computer.
Feynman's
model of
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computer.

13. All quantum computers to date are fancy laboratory ideas!
No one knows if we will be able to make a Quantum computer suitable for real life
use in near future.
 At the same time researchers understand the boost that Quantum computers
are goanna provide us if ever we could make one.
Several technical problems will delay the realization of a quantum computer
atleast by a few decades.
Though it's realization is a nightmare , optimism might do wonders.
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14. http://plato.stanford.edu/ on Progress in Physics’, vol 61 (1998).
A.M. Steane, ‘Reports
http://qubit.org
http://cam.qubit.org pour les calculateurs' by A. Barenco, A.Ekert, A. Sanpera and C. Machiavello appeared in ‘La
'Un saut d'echelle
Recherche ‘November 1996.Adapted by A. Barenco, updated by M. Aulbach.
http://dsd.lbl.gov
http://www.media.mit.edu/quanta/quanta-web/index.html
http://www.howstuffworks.com/ Leah Henderson and Vlatko Vedral.
‘Quantum Entanglement’ by
http://www.iqc.ca/
http://www.physics.unlv.edu
http://ieee.spectrum.org Of David Deutsch.
The Video Lectures
http://wikipedia.org
‘Experimental Realization of Shor’s Quantum Factoring Algorithm’ by M. Steffen,L.M.K.Vandersypen,G.
Breyta,C.S.Yannoni,M.Sherwood,L.Chuang.
‘Quantum Computers’ by Todd A. Brun.
‘Quantum Computers’ by Osama Awwad.
‘Introduction to Quantum Computation’ by Neil Shenvi.
General Nanocomputing by Simon Benjamin and Artur Ekert.
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