a brief description of Quantum Computer and its uses

1. M. RAMACHANDRA
KASHYAP

2. CONTENTS:
• What is quantum computer and how it differs from a classical computer
• The origin of quantum ,quantum superposition
• Quantum circuits vs classical circuits, quantum turing machine
• How Quantum computer differ from super computer
• Future of quantum world , application of quantum in ai
• Advantages and disadvantages of quantum computing
• Conclusion
• references

3. WHAT IS QUANTUM COMPUTER
The Quantum computer is a device that is built on the basis of the
quantum mechanics
It is very different from a normal computer because it has the unique
features when compared to the classical computer
To understand Quantum computer we should have a little knowledge on
the Quantum mechanics
The Quantum mechanics/physics is the branch of physics in which
Newtonian laws does not work any more. It is purely based on the
quantum particles, the particles which are very small like electrons or
photon. The photon is the particle of light which can be travelled as a
particle and also wave here many of the physics laws fail.

4. How it is different from classical computer
Instead of the bits in classical computer the Quantum computer uses
Quantum bits also called as Qu-bits.
The classical logical bit is represented by binary logic based on either logical
high and logical low. Logical high corresponds to binary '1' and logical low
corresponds to binary '0' respectively.
This makes the possibility of 0 and 1 is 50% each.
The Qubit will be in a superposition of the 0 and 1 this makes qubit can be
in any probability of getting 0 to 1.
b

5. The Origin of Quantum Computer
Quantum superposition
The idea of the quantum computer begin with a paper by Richard Feynman in
1982
and later the scientists such as Deutsch, Shor and Grover gave contribution in
algorithms
Today this was biggest achievement and many of the computer scientists are
working under a quantum computer
The superposition of a particle in quantum mechanics can be explained as
the particle can be both in spin up and spin down state at same time

6. WHAT ARE QUANTUM CIRCUITS
The quantum circuits are similar to the circuits which perform the
operations using quantum logic gates
We have AND, NOT, OR, NOR, NAND and XOR gates in classical computer
where as in quantum computing we have H/HADAMARD, PHASE SHIFT,
SWAP, PAULI X, PAULI Y, PAULI Z and etc which can perform similar kind
of operations.
image source: IBM Q experience

7. QUANTUM TURING MACHINE vs CLASSICAL TURING MACHINE
The Quantum Turing machine/Universal Quantum computer

8. QUANTUM COMPUTER vs CLASSICAL COMPUTER
The qubit can be in superposition, this makes the quantum computer to
make calculations faster than a classical computer
If we consider a maze where a computer and a quantum computer are to run
a algorithm
The classical computer end up losing each possibility and starting from start
Where a quantum computer checks out all possibilities at a time by splitting
it self by superpositionQUANTUM COMPUTER vs SUPER COMPUTER
The super computer is same as classical computer but runs in fast
process

9. FUTURE OF QUANTUM WORLD
• Quantum neurons
• Quantum Intelligence
• Quantum Cryptography
• Bottlenecks into the Tunnels
IBM
QUANTUM + ARTIFICIAL
INTELLIGENCE
• Quantum algorithms for
learning
• Quantum algorithms for
decision making
• Quantum searching
• Quantum game theory

10. DISADVANTAGES OF QUANTUM COMPUTING
• The main disadvantage of computing is the technology required to
implement a quantum computer is not available at present. The reason
for this is the consistent electron is damaged as soon as it is affected by
its environment and that electron is very much essential for the
functioning of quantum computers.
• The research for this problem is still continuing the effort applied to
identify a solution for this problem has no positive progress.
• It cannot store the data we need to have the classical bits to store
information.

11. CONCLUSION
Many companies such as IBM, GOOGLE, MICROSOFT are investing lots of
money in making a quantum computer. These companies have a strong
belief that this is future.
The weird behaviour in small particles made this possible
This is the collaboration of the all sciences and this can make a better
future REFERENCES
Mingsheng Ying, Elesevier – Quantum computation, quantum theory and
AI (2009)
D.W.Leung, M.MILLER, Quantum computation - IEEE international
conference on evolution computing