quantum computing

1. Quantum Computing:
Wellcome To Future
By Samira Riki
ECE Department, K.N.TOOSI UNIVERSITY
December, 2014
In The Name Of Him

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3. Quantum computers
 Quantum Computers use
atoms to perform
calculation
 Here computation depends
on
Principle of quantum theory
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4. HISTORY
 1982-Feynman proposed the idea of
creating machines based on the laws of
quantum mechanics instead of the laws of
classical physics.
 1985-David Deutsch developed the
quantum Turing machine,showing that quantum
circuits are universal.
 1994-Peter Shor came up with a
quantum algorithm to factor very large numbers
in polynomial time.
 1997-Lov Grover develops a quantum
search algorithm with O(√𝑁)complexity.
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5. Why Quantum Computer?
 Moor’s Law
 Many kinds of numerical problems cannot be solved using
conventional computers.
 Example:Factorization of a number OR other NPcomplete
problems.
 Some modern simulattions those are taking IBM’s Blue Gene
Supercomputer years ,would take a Q.C. only a matter of
seconds
 A 30 qubit quantum computer could equal the processing
power of a conventional computer that could run a
10teraflops.whereas typical PC’s run at speeds measured in
Gigaflops.
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6. Consepts of quantum computers..
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7. What’s a Qubit?
 A qubit (or QUantum BIT) is similar in concept to a standard
'bit' - it is a memory element. It can hold not only the states '0'
and '1' but a linear superposition of both states, α|0> +β |1> In
physicicts terms, we denote the states |0> and |1> respectively.
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9.  Schrodinger’s CAT Theory
 Quantum entanglement
 Decoherence
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10. Quantum Dots
 It is one of the possible ways to produce
quantum computers.
A single electron trapped inside a cage of
atoms.
When the dot is exposed to a pulse of laser
light of the right wavelength & duration, the
electron is raised to an excited state: a second
burst of laser light causes the electron to fall
back to its ground state.
Ex: NOT gate
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11. Quantum teleportation
 Quantum teleportation is a technique used to
transfer information on a quantum level, usually
from one particle to another.
Its distinguishing feature is that it can transmit the
information present in a quantum superposition,
useful for quantum communication and
computation.
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12. Quantum parallelism
 It is the method in which a quantum computer is able
to perform two or more computations simultaneously.
In classical computers, parallel computing is
performed by having several processors linked
together.
In a quantum computer, a single quantum processor is
able to perform multiple computations on its own.
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13.  Parallelism allows a quantum computer to
work on many computation at once.
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14. Security
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15. Applications
 Quantum networking
 Cryptography
 Artificial Intelligence
 Teleportation
 Quantum Communication
 True Randomness
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16. Dwave
The Newest Quantum Computer
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17. Dwave(con’t)
 DWAVE is a quantum computing company founded in 1999
in Canada ,in order to achieve its goal by making things
happen now and avoid waiting 20 years to apply quantum
computers in an efficient way …so It gathered a dedicated
team of scientists and engineers to do researches. It came up
with the quantum machine that blew the world with its
unbelievable capacity.
 The estimated cost of the commercialized DWAVE quantum
computer is about $10,000,000 .
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18.  Therefore , companies like GOOGLE , NASA and
DWAVE have come together in order to build the
world’s first quantum computer .
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21. How D-Wave Systems Work
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22. IN The Future
 When processor components reach atomic scale, Moore’s Law
breaks down
 Quantum effects become important whether we want them or
not
But huge obstacles in building a practical quantum computer!
 Theory continues in advance , many researchers are looking for
various algorithms and communication protocols to exploit the
properties of quantum systems.
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23.  Conclusion
 http://en.wikipedia.org
 http://www.dwavesys.com
 http://www.wired.com
 http://vista.ir/
 http://www.nature.com/
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 Reference