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Quantum computer

This document provides an overview of quantum computing, including its history, basic concepts, applications, advantages, difficulties, and future directions. It discusses how quantum computing originated in the 1980s with the goal of building a computer that is millions of times faster than classical computers and theoretically uses no energy. The basic concepts covered include quantum mechanics, superpositioning, qubits, quantum gates, and how quantum computers could perform calculations that are intractable on classical computers, such as factoring large numbers. The document also outlines some of the challenges facing quantum computing as well as potential future advances in the field.

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By, ROLLNO : ECE ENGG. COLLEGE
LIST OF CONTENT  Introduction  Quantum & development of quantum theory  Basic concept of quantum computer  Applications  Advantages  Difficulties  Future work  Conclusion
INTRODUCTION  1980, development of a quantum computer was started  1,000,000,000 times faster  Theoretically -no energy consumption  Feynman, 1982  Bit &Qubits
QUANTUM & DEVELOPMENT OF QUANTUM THEORY Quantum  smallest possible discrete unit of any physical property
QUANTUM THEORY  Quantum mechanics  light's duality  James C. Maxwell(E M wave)  photoelectric effect  Schrödinger Equation
BASIC CONCEPT OF QUANTUM COMPUTER Superpositioning  overlap each other without interfering with each other.
+ β
 If this state is measured, we see only one or the other state (live or dead) with some probability. Quantum Turing machine  simple model  Express any quantum algorithm
Qubits  The unit of quantum information is the quantum bit or qubit
Quantum teleportation  Transmission of q bit  quantum information processing Quantum gates  act on qubits and quantum registers  change their states – rotating state vectors
Quantum register  more than one qubits  multi-dimensional Quantum computing  circuit model  Input- quantum register-computation-result
Quantum computer working  not limited by the binary nature  qubit-1 or 0 – combination- any number –decimal  NMR  change the states  Difficult to hold in steady state  Separate atoms  2-5 atoms
D-wave quantum computer
APPLICATION Encryption Technology  Ultra-secure and Super-dense Communications  Improved Error Correction and Error Detection  Molecular Simulations  True Randomness
 cryptography  searching  factorization  simulating  encryption problem & quantum chemistry problem
ADVANTAGES  Much more powerful  Faster  Smaller  Improvements to science  Can improve on practical personal electronics
DIFFICULTIES  Hard to control quantum particles  Lots of heat  Expensive  Difficult to build  Not enough is known about quantum mechanics
FUTURE WORK  Silicon Quantum Computer  It may become technology sooner than we expect  New algorithms and communication  Maximum exploitation  Simulate other quantum systems.
CONCLUSION  very advance technology  very faster & powerful  Stage of infancy  Implementation is difficult
Q’S& A’S
FIRST QUANTUM COMPUTER(VIDEO)
THANK YOU