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What is quantum computing

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This presentation will be helpful for those college students who have to get the basic idea of quantum computing as well as quantum computers

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What is quantum computing

  1. 1. PREPARED BY : MARIYUM KHAN 15-CAB-421 GI8037 BCA(V SEM)
  2. 2.  What is quantum computing?  Requirements of quantum computing  What is a quantum computer?  How quantum computer works?  Why quantum theory in computing?  The differences  What is a qubit?  Quantum properties used…  Conclusion
  3. 3. Quantum computing is the area of study focused on developing computer technology based on the principles of quantum theory, which explains the nature and behavior of energy and matter on the quantum (atomic and subatomic) level. Computers based on this theory are so smaller and faster than digital computers.
  4. 4.  Calculation based on the laws of Quantum Mechanics.  Uses Quantum Mechanical Phenomena to perform operations on data.  Operations done at an atomic/sub-atomic level.
  5. 5.  Many kinds of numerical problems like algorithms cannot be solved using digital computers.  Requirement of faster technology  Requirement of smaller calculating devices  National security require advance supercomputers  Require advanced technology for civilian, business, trade, environmental.
  6. 6. A quantum computer is a machine that performs calculations based on the laws of quantum mechanics, which is the behavior of particles at the sub-atomic level. A Quantum is a smallest possible discrete unit of any physical property Quantum Computing. Computation depends on principle of quantum theory
  7. 7. In a 3-bit register of a classical computer one of the eight numbers can be stored, but in a quantum register all eight numbers can be stored in one register at the same time and operated on simultaneously.
  8. 8. Classical(Newtonian) Mechanics deals with macroscopic system while Quantum Mechanics deals with microscopic system-atomic and subatomic level. Computer system/components are becoming smaller and smaller from mechanical computer to vacuum tubes, to transistors then to IC’s that Classical theory fails to explain. Thus Quantum theory becomes essential..
  9. 9.  A qubit is a quantum bit. As a bit is the basic unit of information in a classical computer, a qubit is the basic unit of information in a quantum computer.  A physical implementation of a qubit could use the two energy levels of an atom. An excited representing |1> and a ground state representing |0>.
  10. 10.  The biggest problem.  States that if a coherent (superposed) state interacts with the environment, it falls into a classical state without superposition.  So quantum computer to work with superposed states, it has to be completely isolated from the rest of the universe (not observing the state, not measuring it..)
  11. 11.  Most important property in quantum information.  States that two or more particles can be linked, and if linked, can change properties of particle(s) changing the linked one.  Two particles can be linked and changed each other without interaction.
  12. 12.  Quantum systems are so small.  It is impossible to measure all properties of a Quantum system without disturbing it.  As a result there is no way of accurately predicting all the properties of a particle in a Quantum System.
  13. 13.  Quantum computer has more to offer.  Advantages outweighs disadvantages.  Wide range of applications.

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