quantum computer speaker: qeopten date: 04/12/23
TRANSCRIPT
Quantum Computer
Speaker: Qeopten
Date: 04/12/23
Outline
Introduction of Quantum computer Information of Quantum computer Implantation of Quantum computer Challenge of Quantum computer Nowadays research of Quantum computer
What Is Quantum Computer?
Any device for computation that makes use of quantum mechanical phenomena to compute equally like classical computer
Quantum Mechanism
Superposition It occurs when an object simultaneously "possess
es" two or more states
Quantum Mechanism (con’t)
}1,0{
12
10
2
1
EX: 2-level,choice basis
possible state
nn xxx ....2211
1....22
2
2
1 n αi → amplitude
},....,,{ 21 nxxx → orthogonal basis
Outline
Introduction of Quantum computer Information of Quantum computer Implantation of Quantum computer Challenge of Quantum computer Nowadays research of Quantum computer
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?
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 2300 at one time
Detail in Qubit
State : 1 0 State : 0 1 State : 0 0 / 0 1 / 1 0 / 1 1
Superposition state
Differs from classical information
There can exist superpositions of different values
It cannot generally be read or duplicated without disturbance
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 argum
ent to a function
Quantum Information App.
Quantum Computing Perform operations according to quantum mecha
nisms Quantum Cryptography
A method for securing communications based on quantum mechanics
Quantum Teleportation A technique to transfer a quantum state to an arbi
trarily distant location
Outline
Introduction of Quantum computer Information of Quantum computer Implantation of Quantum computer Challenge of Quantum computer Nowadays research of Quantum computer
Implementation (1)
Implementation (2)
semiconductor materials
Confine single electron in discrete energy level
Quantum dot
Control by Laser
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
Implementation (3)
ions
4 rod electrodes AC 1kv MHztrap the ions
End-rings Charged to prevent escaping
Ion trap
Outline
Introduction of Quantum computer Information of Quantum computer Implantation of Quantum computer Challenge of Quantum computer Nowadays research of Quantum computer
Challenge
Fabrication of logic unit New quantum algorithm Error correction code Fault-tolerance Control superposition, coherence state
Outline
Introduction of Quantum computer Information of Quantum computer Implantation of Quantum computer Challenge of Quantum computer Nowadays research of Quantum computer
Nowadays Research
America: SQUINT (Southwest Quantum
Information and Technology) IBM Cal tech, Stanford, Berkeley, MIT, USC
NASA, HP, Bell Lab, AT&T
IBM Research
NMR Quantum Computation Project
Desktop NMR quantum co-processor
10-40 qubit quantum computer
NMR Quantum Computation Project (con’t)
Now!
Nowadays Research
European : Information Society Technologies
United Kingdom: CQC( Centre for Quantum Computation) Oxford, Cambridge
Nowadays Research
Asia: ERATO (Exploratory Research for Advanced
Technology)
Australian: Centre for Quantum Computer Technology
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
Thank you
Thank you
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alive