News tagged with superposition
143 is largest number yet to be factored by a quantum algorithm
(Phys.org) -- While factoring an integer is a simple problem when the integer is small, the complexity of factorization greatly increases as the integer increases. When the integer grows to more than 100,000 ...
Apr 11, 2012 |
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Light pulses take a quantum walk
Tourists who drift aimlessly during a sightseeing tour are moving randomly - just like electrons that move from one atom to the next. To obtain a better understanding of these random motions it is often useful ...
Mar 21, 2012 |
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Keeping it together: Protecting entanglement from decoherence and sudden death
(PhysOrg.com) -- Decoherence can be metaphorically seen as a quantum fall from grace: When quantum bits, or qubits, are in superposition – such as a single qubit simultaneously having both 1 and 0 values ...
Feb 27, 2012 |
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Quantum cats are hard to see
Are there parallel universes? And how will we know? This is one of many fascinations people hold about quantum physics. Researchers from the universities of Calgary and Waterloo in Canada and the University ...
Dec 16, 2011 |
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Vibration rocks for entangled diamonds
(PhysOrg.com) -- Diamonds are celebrated for their enduring beauty and hardness but they can also be a physicist’s best friend.
Dec 16, 2011 |
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A new 'lens' for looking at quantum behavior
(PhysOrg.com) -- In a paper published in Physical Review Letters, researchers Daniel Terno (Macquarie University, Australia) and Radu Ionicioiu (Institute of Quantum Computing, Canada) provide a new perspe ...
Dec 14, 2011 |
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One clock with two times: When quantum mechanics meets general relativity
The unification of quantum mechanics and Einstein's general relativity is one of the most exciting and still open questions in modern physics. General relativity, the joint theory of gravity, space and time ...
Oct 19, 2011 |
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Breakthrough in quantum computing: Resisting 'quantum bug'
Scientists have taken the next major step toward quantum computing, which will use quantum mechanics to revolutionize the way information is processed.
Jul 20, 2011 |
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Prototype 'optics table on a chip' places microwave photon in two colors at once
(PhysOrg.com) -- Researchers at the National Institute of Standards and Technology (NIST) have created a tunable superconducting circuit on a chip that can place a single microwave photon (particle of light) ...
Jul 07, 2011 |
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Physicists seek to quantify macroscopic quantum states
(PhysOrg.com) -- "Scientists have been interested in generating and observing macroscopic quantum superpositions in order to test quantum mechanics at the macroscopic scale," physicist Hyunseok Jeong of Seoul National University ...
Jun 29, 2011 |
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All-optical quantum computation, step 1: A controlled-NOT photonic gate
(PhysOrg.com) -- The often counterintuitive quantum world of superposition, entanglement, and tunneling can greatly enhance applications as diverse as communication, information processing, and precision measurement. ...
Jun 24, 2011 |
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Long live the qubit!
A quantum computer is a device -- still largely theoretical -- that could perform some types of calculations much more rapidly than classical computers. While a bit in a classical computer can represent either ...
Jun 02, 2011 |
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Atom and its quantum mirror image
A team of physicists experimentally produces quantum-superpositions, simply using a mirror.
Apr 05, 2011 |
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'Quantum computer' a stage closer with silicon breakthrough
The remarkable ability of an electron to exist in two places at once has been controlled in the most common electronic material - silicon - for the first time. The research findings - published in Nature by a U ...
Jun 23, 2010 |
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Light controls matter, matter controls x-rays
Like playing a game of scissors-paper-rock, a team of scientists led by Thornton E. (Ernie) Glover of Lawrence Berkeley National Laboratory's Advanced Light Source (ALS), Linda Young of Argonne National Laboratory, ...
Mar 24, 2010 |
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