1. Quantum Computer Speaker: Qeopten Date: 04/12/23

2. Outline Introduction of Quantum computer Information of Quantum computer Implantation of Quantum computer Challenge of Quantum computer Nowadays research of Quantum computer

3. What Is Quantum Computer? Any device for computation that makes use of quantum mechanical phenomena to compute equally like classical computer

4. Quantum Mechanism Superposition It occurs when an object simultaneously "possesses" two or more states

5. Quantum Mechanism (con’t) EX: 2-level,choice basis possible state α i → amplitude → orthogonal basis

6. Outline Introduction of Quantum computer Information of Quantum computer Implantation of Quantum computer Challenge of Quantum computer Nowadays research of Quantum computer

7. Quantum Information A physical information that is held in the "state" of a quantum system A qubit (quantum +bit) is a unit of quantum information What is qubit?

8. Bit & Qubit Bit: high/low voltage  1/0 One state  either 1 or 0 represent one state at one time EX:300 bits represent one state at one time Qubit: exist or not in Orbit  1/0 One state  possibly 1 or 0 represent several state at one time EX:300 qubits represent 2 300 at one time

9. Detail in Qubit State : 1 0State : 0 1 State : 0 0 / 0 1 / 1 0 / 1 1 Superposition state

10. Differs from classical information There can exist superpositions of different values It cannot generally be read or duplicated without disturbance

11. Shor's Algorithm A quantum algorithm factoring a number N in O((log N) 3 ) time factoring a number N in O(log N) space Application Quantum Parallelism Qubit has the superposition property Each component may be thought of as a single argument to a function

12. Quantum Information App. Quantum Computing Perform operations according to quantum mechanisms Quantum Cryptography A method for securing communications based on quantum mechanics Quantum Teleportation A technique to transfer a quantum state to an arbitrarily distant location

13. Outline Introduction of Quantum computer Information of Quantum computer Implantation of Quantum computer Challenge of Quantum computer Nowadays research of Quantum computer

14. Implementation (1)

15. Implementation (2) semiconductor materials Confine single electron in discrete energy level Quantum dot Control by Laser

16. In 1999, Japan 代表 1 的波峰 代表 0 的波谷 波峰波谷連續出現  superposition state

17. Implementation (3) ions 4 rod electrodes AC 1kv MHz trap the ions End-rings Charged to prevent escaping Ion trap

18. Outline Introduction of Quantum computer Information of Quantum computer Implantation of Quantum computer Challenge of Quantum computer Nowadays research of Quantum computer

19. Challenge Fabrication of logic unit New quantum algorithm Error correction code Fault-tolerance Control superposition, coherence state

20. Outline Introduction of Quantum computer Information of Quantum computer Implantation of Quantum computer Challenge of Quantum computer Nowadays research of Quantum computer

21. Nowadays Research America : SQUINT (Southwest Quantum Information and Technology) IBM Cal tech, Stanford, Berkeley, MIT, USC NASA, HP, Bell Lab, AT&T

22. IBM Research

23. NMR Quantum Computation Project Desktop NMR quantum co-processor 10-40 qubit quantum computer

24. NMR Quantum Computation Project (con’t) Now!

25. Nowadays Research European : Information Society Technologies United Kingdom: CQC( Centre for Quantum Computation) Oxford, Cambridge

26. Nowadays Research Asia: ERATO (Exploratory Research for Advanced Technology) Australian : Centre for Quantum Computer Technology

27. Conclusion Quantum computer is a device for computation that makes use of quantum mechanical phenomena Quantum computer use qubit to present an information There exist many challenge to overcome

28. Thank you

29. ? dead alive