One of the many promising applications of quantum mechanics in the information sciences is quantum key distribution (QKD), in which the counterintuitive behavior of quantum particles guarantees that no one can eavesdrop on ...
Quantum Physics
May 21, 2013
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(Phys.org) —Albert Einstein famously described quantum entanglement as "spooky action at distance"; however, up until now experiments that examine this peculiar aspect of physics have been limited to relatively small distances ...
Quantum Physics
Apr 9, 2013
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(Phys.org) —Can worldwide communication ever be fully secure? Quantum physicists believe they can provide secret keys using quantum cryptography via satellite. Unlike communication based on classical bits, quantum cryptography ...
Quantum Physics
Apr 3, 2013
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In this month's special edition of Physics World, focusing on quantum physics, Thomas Jennewein and Brendon Higgins from the Institute for Quantum Computing at the University of Waterloo, Canada, describe how a quantum space ...
Quantum Physics
Feb 28, 2013
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A new photodetector can cleanly discriminate among four states, not just the standard two states of binary logic.
Optics & Photonics
Jan 6, 2013
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(Phys.org)—Researchers from Toshiba and the Department of Engineering have perfected a technique that offers a less expensive way to ensure the security of high-speed fibre-optic cables, protecting communication networks ...
Quantum Physics
Dec 5, 2012
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(Phys.org)—Researchers from Toshiba and Cambridge University working together in Britain have developed a technique for sending quantum encryption keys over a shared fiber cable. As they describe in their paper published ...
A future quantum computer will be able to carry out calculations billions of times faster than even today's most powerful machines by exploit the fact that the tiniest particles, molecules, atoms and subatomic particles can ...
Engineering
Nov 16, 2012
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(Phys.org)—A team of German physicists has successfully demonstrated an ability to perform quantum key distribution (QKD) exchange between an airplane in flight and a ground station, paving the way perhaps to the same kinds ...
Single particles of light, also known as photons, have been produced and implemented into a quantum key distribution (QKD) link, paving the way for unbreakable communication networks.
Quantum Physics
Aug 3, 2012
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