ByB.Manish.Reddy

What is a quantum computer?

A quantum computer is a machine that performs calculations based on the laws of quantum mechanics

1.History2.About Moor’s Law3.Explanation about qbit4.Quntam circuits5. Benefits of quantum computing6. Projected Risks\Disadvantages of Quantum Computing7. Today’s Quantum Computers8. Conclusion

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.

Moore’s law would not be obeyed if there is no shift from classical computing to quntum computingAs the no of transistors increase it would become difficult to fabricate them and at a stage it would be impossible as the space reduces

A bit is the basic unit of almost every modern computer system. The word bit is a contraction of the term binary digit.It is eighter 0 or 11 for positive voltage0 for neagitive voltage What is a qbit?

A qubit is a quantum bit , the counterpart in quantum computing to the binary digit or bit of classical computing. Just 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 .

Electrons rotate around the newcleus depending on the charge

Classical computational gates are Boolean logic gates that perform manipulations of the information stored in the bits.

In quantum computing these gates are represented by matrices, and can be visualized as rotations of the quantum state on the Bloch sphere.

One feature of quantum gates that distinguishes them from classical gates is that they are reversible: the inverse of a unitary matrix is also a unitary matrix, and thus a quantum gate can always be inverted by another quantum gate

Quantum circuits are similar to classical computer circuits in that they consist of wires and logical gates. The wires are used to carry the information, while the gates manipulate it (note that the wires do not correspond to physical wires; they may

Quantum Circuits

correspond to a physical particle, a photon, moving from one location to another in space, or even to time-evolution). Conventionally, the input of the quantum circuit is assumed to be a computational basis state, usually the state consisting of all. The output state of the circuit is then measured in the computational basis, or in any other arbitrary orthonormal basis. The first quantum algorithms (i.e. Deutsch-Jozsa, Simon, Shor and Grover) were constructed in this paradigm. Additional paradigms for

quantum computing exist today that differ from the quantum circuit model in many interesting ways. So far, however, they all have been demonstrated to be computationally equivalent to the circuit model, in the sense that any computational problem that can be solved by the circuit model can be solved by these new models with only a polynomial overhead in computational resources.

D-WAVE Quantum Processor

A 30 bit quantum computer is power full than the wold’s most advanced supper computer

A 300 bit quantum computer is power full than the computers In the world joined together

Quantum Computation : increase in computing powerUtilizing quantum parallelism, quantum computers will well serve the purpose of performing difficult mathematical calculations that are impossible using semiconductor computers

Artificial IntelligenceThe theories of quantum computation suggest that every physical object, even the universe, is in some sense a quantum computer. Ultimately this suggests that computers will be capable of simulating conscious rational thought, maybe the quantum computer will be the key to achieving true artificial intelligence.

SecurityIt is like an hydrogen bomb in the hands of hacker’s as they can break any security key and criptographic dataArtificial intligenceAs the meashines are given more power than a human it is of great risck

Algorithms are harder to desgn when compared to normal algorithms

1998 Los Alamos and MIT researchers managed to spread a single qubit across three nuclear spins in each molecule of a liquid solution of alanine (an amino acid used to analyze quantum state decay) or trichloroethylene (a chlorinated hydrocarbon used for quantum error correction) molecules.

2007 Canadian startup company D-Wave demonstrated a 16-qubit quantum computer. The computer solved a Sudoku puzzle and other pattern matching problems.

On May 11, 2011, D-Wave Systems announced the D-Wave One, an integrated quantum computer system running on a 128 qubit processor. The processor used in the D-Wave One code-named "Rainier", performs a single mathematical operation named Discrete optimization. Rainier uses a process called quantum annealing to solve optimization problems. The D-Wave One is claimed to be the world's first commercially available quantum computer system.The cost will be approximately $10,000,000= rupees 650000000

What comes after Quantum Computing ?Scientists claim that computers can now be stored in carbon-based beings, within DNA. Scientists have long known that DNA could store information. But only when Charles Bennett, in 1973, drew attention to the computational capability that is responsible for processing genetic information in DNA did researchers begin to recognize the potential of a biological computer.

However, DNA computing is based on the foundation of quantum computing : ability to manipulate atoms.

DNA molecule

ConclusionAlthough the future of quantum computing looks promising,

we have only just taken our first steps to actually realizing a quantum computer. There are many hurdles which need to be overcome before we can begin to appreciate the benefits they may deliver. Researchers around the world are racing to be the first to achieve a practical system, a task which some scientists think is futile..

In comparison the progress in quantum communications has been somewhat more fruitful. Companies like D-vave have actually achieved working

Nothing is impossible Think different

Thank you