quantum computer

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quantum computer

[′kwän·təm kəm¦pyüd·ər]
(computer science)
A computer in which the time evolution of the state of the individual switching elements of the computer is governed by the laws of quantum mechanics.

quantum computer

(computer)
A type of computer which uses the ability of quantum systems, such as a collection of atoms, to be in many different states at once. In theory, such superpositions allow the computer to perform many different computations simultaneously. This capability is combined with interference among the states to produce answers to some problems, such as factoring integers, much more rapidly than is possible with conventional computers. In practice, such machines have not yet been built due to their extreme sensitivity to noise.

Oxford University, Stanford University.

A quantum search algorithm for constraint satisfaction problems exhibits the phase transition for NP-complete problems.
References in periodicals archive ?
Intelligence Advanced Research Projects Activity (IARPA) program has notified IBM that it will award its scientists a major multi-year research grant to advance the building blocks for a universal quantum computer.
Silicon transistors have been converted into the basic components of a quantum computer.
The advance represents the final physical component needed to realise the promise of super-powerful silicon quantum computers, which harness the science of the very small -- the strange behaviour of subatomic particles -- to solve computing challenges that are beyond the reach of even today's fastest supercomputers.
Jointly established by the Chinese Academy of Sciences (CAS) and China's Internet giant Alibaba, the lab is expected to produce a general-purpose quantum computer prototype with 50-100 quantum bits by 2030, scientists at the lab told Xinhua.
While quantum computers have traditionally been explored for cryptography, one area we find very compelling is the potential for practical quantum systems to solve problems in physics and quantum chemistry that are unsolvable today.
Post-quantum cryptography is a relatively new field in which research is conducted on public-key encryption systems, which are not breakable using quantum computers.
He said that quantum computers will hit within a decade, the governments and companies will be able to decrypt standard RSA public key transmission left and right.
3 ( ANI ): The US' National Security Agency is reportedly aiming to build a quantum computer that could break any and every type of encryption used to protect banking, medical, business and government records around the world.
Quantum computers promise to deliver an exponential increase in processing power over conventional computers by using a single electron or nucleus of an atom as the basic processing unit-a quantum bit, or qubit.
Quantum computers will have unprecedented computational power for tasks including search engines and the design of new materials, pharmaceuticals and clean energy devices.
Quantum computers are "wired" so that they can do many calculations at the same time.
Researchers have taken a significant step towards the designing an ultrafast quantum computer that could operate at speeds even more mind-boggling than the world's fastest super-computers.

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