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.

1. By,
ROLLNO :
ECE
ENGG. COLLEGE

2. LIST OF CONTENT
 Introduction
 Quantum & development of quantum theory
 Basic concept of quantum computer
 Applications
 Advantages
 Difficulties
 Future work
 Conclusion

3. INTRODUCTION
 1980, development of a quantum computer
was started
 1,000,000,000 times faster
 Theoretically -no energy consumption
 Feynman, 1982
 Bit &Qubits

4. QUANTUM & DEVELOPMENT OF
QUANTUM THEORY
Quantum
 smallest possible discrete unit of any physical
property

5. QUANTUM THEORY
 Quantum mechanics
 light's duality
 James C. Maxwell(E M wave)
 photoelectric effect
 Schrödinger Equation

6. BASIC CONCEPT OF QUANTUM
COMPUTER
Superpositioning
 overlap each other without interfering with each
other.

7. + β

8.  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

9. Qubits
 The unit of quantum information is the
quantum bit or qubit

10. Quantum teleportation
 Transmission of q bit
 quantum information processing
Quantum gates
 act on qubits and quantum registers
 change their states – rotating state vectors

11. Quantum register
 more than one qubits
 multi-dimensional
Quantum computing
 circuit model
 Input- quantum register-computation-result

12. 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

13. D-wave quantum computer

14. APPLICATION
Encryption Technology
 Ultra-secure and Super-dense
Communications
 Improved Error Correction and Error
Detection
 Molecular Simulations
 True Randomness

15.  cryptography
 searching
 factorization
 simulating
 encryption problem & quantum chemistry
problem

16. ADVANTAGES
 Much more powerful
 Faster
 Smaller
 Improvements to science
 Can improve on practical personal
electronics

17. DIFFICULTIES
 Hard to control quantum particles
 Lots of heat
 Expensive
 Difficult to build
 Not enough is known about quantum mechanics

18. FUTURE WORK
 Silicon Quantum Computer
 It may become technology sooner than we
expect
 New algorithms and communication
 Maximum exploitation
 Simulate other quantum systems.

19. CONCLUSION
 very advance technology
 very faster & powerful
 Stage of infancy
 Implementation is difficult

20. Q’S& A’S

21. FIRST QUANTUM COMPUTER(VIDEO)

22. THANK YOU