Quantum Computing

Image of computerThe Next Generation of Computing Devices?

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5 . . . Following are five main generation of computers :S.N Generation Generation-period Description 1. 1 1946-1959 Vacuum tube based 2. 2 1959-1965 Transistor based 3. 3 1965-1971 Integrated Circuit based 4. 4 1971-1980 VLSI microprocessor

5. 5 1980-present ULSI microprocessor

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Computer Generation :

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Quantum Computer :

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Nobel Prize in Quantum Computing Serge HarocheDavid Jeffrey Wineland

David J Wineland Serge Haroche 2012.

Moores Law to the Atomic-scale

Moores Law to the Atomic-scale Intel founder image

Gordon Moore :Co-founder of Intel

No of transistor double after 18 month or 2 year.

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Transistor

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Schrodinger Cat Experiment Quantum Physics

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"" . Well defined Spin

Quantum Element (, , ) . . .Quantum physics is not magic

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Q-bit

Nucleusp+

Quantum bits :

Digital information : 1

Quantum bits :

Digital information : 0

"0" "1". Quantum :

Problem:

Difficult problem : travelling salesman

Cities routes time taken14 10 sec 22 771 year 28 -------------10 sec

771 year

Older than universe

. bit , Q-bit. , , / .Main building blocks of Quantum computer is : Q-bits

Superposition

Entanglement

Superposition . , Q-bit, , ' .

qubit, . , spin-up , , spin-down . , .

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, , , . . Double slit Experiment Schrodingers cat Experiment

Entanglement ()

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Entanglement spooky reaction

Spin up Spin down Spin down Spin up Entangleparticle Entangleparticle

Power of Q-bits

No of Q-bits Classical possibilities power

0 or 1 2 00,01,10,11 4 000,001,010,011 8 100,101,110,111 N ---------------------- 100 Q-bit ....

500 Q-bit

Representation of Q-bits/states / , Dirac . Dirac .Dirac notation : |> : .

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