Quantum Computer Speaker: Qeopten Date: 04/12/23.
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Transcript of Quantum Computer Speaker: Qeopten Date: 04/12/23.
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Quantum Computer
Speaker: Qeopten
Date: 04/12/23
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Outline
Introduction of Quantum computer Information of Quantum computer Implantation of Quantum computer Challenge of Quantum computer Nowadays research of Quantum computer
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What Is Quantum Computer?
Any device for computation that makes use of quantum mechanical phenomena to compute equally like classical computer
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Quantum Mechanism
Superposition It occurs when an object simultaneously "possess
es" two or more states
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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
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Outline
Introduction of Quantum computer Information of Quantum computer Implantation of Quantum computer Challenge of Quantum computer Nowadays research of Quantum computer
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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?
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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
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Detail in Qubit
State : 1 0 State : 0 1 State : 0 0 / 0 1 / 1 0 / 1 1
Superposition state
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Differs from classical information
There can exist superpositions of different values
It cannot generally be read or duplicated without disturbance
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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
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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
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Outline
Introduction of Quantum computer Information of Quantum computer Implantation of Quantum computer Challenge of Quantum computer Nowadays research of Quantum computer
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Implementation (1)
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Implementation (2)
semiconductor materials
Confine single electron in discrete energy level
Quantum dot
Control by Laser
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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
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Implementation (3)
ions
4 rod electrodes AC 1kv MHztrap the ions
End-rings Charged to prevent escaping
Ion trap
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Outline
Introduction of Quantum computer Information of Quantum computer Implantation of Quantum computer Challenge of Quantum computer Nowadays research of Quantum computer
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Challenge
Fabrication of logic unit New quantum algorithm Error correction code Fault-tolerance Control superposition, coherence state
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Outline
Introduction of Quantum computer Information of Quantum computer Implantation of Quantum computer Challenge of Quantum computer Nowadays research of Quantum computer
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Nowadays Research
America: SQUINT (Southwest Quantum
Information and Technology) IBM Cal tech, Stanford, Berkeley, MIT, USC
NASA, HP, Bell Lab, AT&T
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IBM Research
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NMR Quantum Computation Project
Desktop NMR quantum co-processor
10-40 qubit quantum computer
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NMR Quantum Computation Project (con’t)
Now!
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Nowadays Research
European : Information Society Technologies
United Kingdom: CQC( Centre for Quantum Computation) Oxford, Cambridge
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Nowadays Research
Asia: ERATO (Exploratory Research for Advanced
Technology)
Australian: Centre for Quantum Computer Technology
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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
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Thank you
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Thank you
?dead
alive