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. Key Laboratory of Quantum Information (CAS), University of Science and Technology of China has recently demonstrated a metropolitan Quantum Cryptography Network (QCN) for Government Administration in Wuhu, China. The project is reported in Volume 54, Issue 17 (September, 2009) of the Chinese Science Bulletin authored by Fang-xing Xu et al. http://www.physorg.com/news174891921.html Physics Fri, 16 Oct 2009 06:06:41 EST news174891921 In what may prove to be a major development for scientists in fields ranging from forensics to quantum communications, researchers at the National Institute of Standards and Technology have developed a new, highly sensitive, low-cost technique for measuring light in the near-infrared range. http://www.physorg.com/news170516085.html Physics Wed, 26 Aug 2009 15:10:01 EST news170516085 Researchers from across Europe have united to build the largest quantum key distribution network ever built. The efforts of 41 research and industrial organisations were realised as secure, quantum encrypted information was sent over an eight node, mesh network. http://www.physorg.com/news165736188.html Physics Thu, 02 Jul 2009 06:50:19 EST news165736188 A team of physicists and engineers have demonstrated all-fibre quantum logic, where single photons are generated and used to perform the controlled-NOT quantum logic gate in optical fibres with high fidelity. http://www.physorg.com/news162736415.html Physics Thu, 28 May 2009 13:34:04 EST news162736415 Austrian physicists say a breakthrough in next-generation quantum cryptography could allow encrypted messages to be bounced off satellites, the British journal Nature reported Sunday. http://www.physorg.com/news160593524.html Physics Sun, 03 May 2009 18:19:09 EST news160593524 Quantum cryptography, a completely secure means of communication, is much closer to being used practically as researchers from Toshiba and Cambridge University's Cavendish Laboratory have now developed high speed detectors capable of receiving information with much higher key rates, thereby able to receive more information faster. http://www.physorg.com/news160274090.html Physics Thu, 30 Apr 2009 01:36:30 EST news160274090 Applied scientists at the Harvard School of Engineering and Applied Sciences (SEAS) in collaboration with researchers from Hamamatsu Photonics in Hamamatsu City, Japan, have demonstrated, for the first time, lasers in which the direction of oscillation of the emitted radiation, known as polarization, can be designed and controlled at will. The innovation opens the door to a wide range of applications in photonics and communications. Harvard University has filed a broad patent on the invention. http://www.physorg.com/news158814118.html Physics Mon, 13 Apr 2009 04:02:48 EST news158814118 (PhysOrg.com) -- Large, perfect diamonds are precious to almost all of us but to some scientists, it is the defects that really matter. This is because defects can form nanoscopic color centers, which play a key role in the development of both quantum computing and quantum cryptography. A research team at the Max Planck Institute for Biophysical Chemistry in Göttingen has now probed these color centers inside the crystal with unprecedented resolution using an optical microscope. Using STED microscopy, the scientists identified even densely packed color centers and determined their position inside the crystal with a precision better than 0.15 nanometers, corresponding to the dimension of an atom. (Nature Photonics, 22nd February 2009). http://www.physorg.com/news155233957.html Physics Mon, 02 Mar 2009 16:33:30 EST news155233957 (PhysOrg.com) -- For the first time the transmission of data secured by quantum cryptography is demonstrated within a commercial telecommunications network. 41 partners from 12 European countries, including academics from the University of Bristol, have worked on realising this quantum cryptographic network since April 2004. http://www.physorg.com/news142677178.html Physics Wed, 08 Oct 2008 09:32:58 EST news142677178 Researchers from the National Institute of Standards and Technology and the Joint Quantum Institute (JQI), a collaborative center of the University of Maryland and NIST, have reported a new way to fine-tune the light coming from quantum dots by manipulating them with pairs of lasers. Their technique, published in Physical Review Letters, could significantly improve quantum dots as a source of pairs of `entangled` photons, a property with important applications in quantum information technologies. http://www.physorg.com/news138385106.html Nanotechnology Tue, 19 Aug 2008 17:18:26 EST news138385106 Las Vegas shows often are on the cutting edge. Following this tradition, researchers from the National Institute of Standards and Technology (NIST) and their colleagues at the National University of Singapore (NUS) have landed gigs this week at Caesar's Palace and the Riviera Hotel and Casino to perform live demonstrations of quantum cryptography, theoretically the most secure form of encryption. http://www.physorg.com/news137253732.html Physics Wed, 06 Aug 2008 15:02:12 EST news137253732 (PhysOrg.com) -- Electronic communication is becoming more secure all over the world. Siemens IT Solutions and Services, Austrian Research Centers (ARC) and Graz University of Technology have joined forces to develop the first quantum cryptography chip for commercial use. The chip, which protects data by generating a completely random sequence of numbers from particles of light, replaces the currently used system of key distribution based on mathematical algorithms. http://www.physorg.com/news136819764.html Physics Fri, 01 Aug 2008 14:29:24 EST news136819764