Today's Word of the Day means...

1.

a computer that makes use of the quantum states of electrons or other particles to store and process information as quantum bits.

Related forms

quantum computing, noun

Dictionary.com Unabridged

Based on the Random House Dictionary, © Random House, Inc. 2014.

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Based on the Random House Dictionary, © Random House, Inc. 2014.

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Examples for quantum computer

- With a small number of qubits, a
*quantum computer*could perform a vast number of calculations in parallel. - And it is the first
*quantum computer*to simulate and calculate the behavior of a molecular, quantum system. - The other is that it's the amount required to simulate the universe on a
*quantum computer*. - Their discovery could help pave the way toward a practical
*quantum computer*. - Any user of quantum money can verify that this money is kosher using a quantum algorithm running on a
*quantum computer*. - Nah, the universe is not a
*quantum computer*, it is actually a giant organism whose genes are constantly mutating. - Even the new device, although reasonably reliable, lacks the fidelity desired of a practical
*quantum computer*. - It has practical implications, because a
*quantum computer*is going to be a hybrid system. - The same holds true for a bit in a
*quantum computer*, called a qubit. - Given the large number of rubidium atoms in the optical lattice, he says, they could provide the memory for a
*quantum computer*.

British Dictionary definitions for quantum computer

noun

1.

a type of computer which uses the ability of quantum systems to be in many different states at once, thus allowing it to perform many different computations simultaneously

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition

© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins

Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins

Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Cite This Source

quantum computer in Science

quantum computer A computer that exploits the quantum mechanical properties of superposition in order to allow a single operation to act on a large number of pieces of data. In a quantum computer, the data to be manipulated, represented in quantum bits, exists in all possible states simultaneously, in superposition. This allows a single operation to operate over all of these states at once, in contrast with a classical computer, which must carry out an operation for each state separately. Because of the difficulty of creating environments small enough for quantum effects to emerge but sufficiently isolated to prevent interaction with outside influences such as heat, only extremely rudimentary quantum computers currently exist, though algorithms for possible future devices are being developed. |

The American Heritage® Science Dictionary

Copyright © 2002. Published by Houghton Mifflin. All rights reserved.

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Copyright © 2002. Published by Houghton Mifflin. All rights reserved.

Cite This Source

quantum computer in Technology

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 (http://eve.physics.ox.ac.uk/QChome.html), Stanford University (http://feynman.stanford.edu/qcomp/).

A quantum search algorithm (ftp://parcftp.xerox.com/pub/dynamics/quantum.html) for constraint satisfaction problems exhibits the phase transition for NP-complete problems.

(1997-02-11)

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 (http://eve.physics.ox.ac.uk/QChome.html), Stanford University (http://feynman.stanford.edu/qcomp/).

A quantum search algorithm (ftp://parcftp.xerox.com/pub/dynamics/quantum.html) for constraint satisfaction problems exhibits the phase transition for NP-complete problems.

(1997-02-11)

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