http://www.physorg.com/ en-us Physorg.com internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine. Quantum computing promises ultra-fast communication, computation and more powerful ways to encrypt sensitive information. But trying to use quantum states as carriers of information is an extremely delicate business. Now two physicists have shown, mathematically, how to gently tease out unwanted knots in quantum communication, while keeping the information intact. Their work is reported in the current issue of Physical Review Letters and highlighted with a Viewpoint in Physics. http://www.physorg.com/news178211021.html Physics Mon, 23 Nov 2009 15:20:01 EST news178211021 (PhysOrg.com) -- Quantum key distribution (QKD) could be the next commercial success of quantum physics, and a recent study has taken the field a step closer to this reality. Researchers from the University of Geneva in Switzerland and Corning Incorporated in New York have demonstrated a new QKD prototype that can distribute quantum keys over a distance of 250 km in the lab, improving upon the previous record of 200 km. The scientists hope that the achievement will lead to the goal of distributing quantum keys over intercity distances of 300 km in the near future. http://www.physorg.com/news167390366.html Physics Tue, 21 Jul 2009 10:19:59 EST news167390366 Miniature devices for trapping ions (electrically charged atoms) are common components in atomic clocks and quantum computing research. Now, a novel ion trap geometry demonstrated at the National Institute of Standards and Technology could usher in a new generation of applications because the device holds promise as a stylus for sensing very small forces or as an interface for efficient transfer of individual light particles for quantum communications. http://www.physorg.com/news165668548.html Physics Wed, 01 Jul 2009 12:02:59 EST news165668548 (Santa Barbara, Calif.) -- In the quest for quantum information processing, diamonds may be a physicist's best friend. http://www.physorg.com/news159024814.html Physics Wed, 15 Apr 2009 14:37:09 EST news159024814 (PhysOrg.com) -- When most people think of quantum communication, they think in terms of private communication channels - the ability to send messages without a third-party deciphering them. Indeed, quantum cryptography represents a method of sending information that cannot be eavesdropped upon. Without the proper key for decoding the intercepted message, all an interloper would receive is gibberish. To make quantum cryptography work, Graeme Smith tells PhysOrg.com, `We try to understand the protocols and use specially designed channels to send messages and also to shed light on the general theory of privacy in quantum mechanics.` http://www.physorg.com/news151590458.html Physics Mon, 19 Jan 2009 12:28:18 EST news151590458 (PhysOrg.com) -- A new approach to calibrating quantum mechanical measurement has been developed with particular applications in optics and super-secure quantum communication. http://www.physorg.com/news146150726.html Physics Mon, 17 Nov 2008 13:25:26 EST news146150726 (PhysOrg.com) -- Physicists have taken a step closer to realizing long-distance quantum communication, in which a quantum state is transferred from one location to another by becoming entangled with a traveling photon. http://www.physorg.com/news142609071.html Physics Tue, 07 Oct 2008 14:37:51 EST news142609071 (PhysOrg.com) -- Physicists have discovered a strange characteristic of quantum communication channels. If two quantum channels each have a transmission capacity of zero, they may still have a nonzero capacity when used together. This effect, which has no classical counterpart, reveals a new complexity in the fundamental nature of quantum communication. http://www.physorg.com/news142500861.html Physics Mon, 06 Oct 2008 08:34:21 EST news142500861 The Viterbi Algorithm, the elegant 41-year-old logical tool for rapidly eliminating dead end possibilities in data transmission, has a new application to go alongside its ubiquitous daily use in cell phone communications, bioinformatics, speech recognition and many other areas of information technology. http://www.physorg.com/news136736147.html Physics Thu, 31 Jul 2008 15:15:47 EST news136736147