Search results for cryptography
First quantum teleportation between light and matter
Oct 05, 2006 |
4.5 / 5 (142) |
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The concept of quantum teleportation - the disembodied complete transfer of the state of a quantum system to any other place - was first experimentally realised between two different light beams. Later it became also possible ...
The world's lowest noise laser: Researchers outsmart quantum physics
Jan 25, 2008 |
4.7 / 5 (128) |
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Researchers at the Max Planck Institute for Gravitational Physics and Leibniz University of Hanover have produced a laser beam of especially high quality. In doing so, they have achieved a new world record ...
Qubits and Branes Share Surprising Features
Jul 03, 2008 |
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What do black holes and entangled particles have in common? Until about a year ago, physicists thought that the two entities existed in completely separate worlds. Then, in 2007, physicist Michael Duff from ...
Scientists make single-photon sources brighter
Dec 12, 2007 |
4.6 / 5 (72) |
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Scientists have achieved a major advance in developing a single-photon light source, bringing quantum applications such as quantum computing and quantum cryptography closer to reality.
Disorder helps to 'hyperfocus' waves in time reversal acoustics
Physics /
Mar 24, 2006 |
4.8 / 5 (61) |
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For every burst of sound, there must exist a sound that bursts in reverse, according to the theory of time reversal acoustics. From their discoveries of some surprising characteristics of mediums and frequencies, ...
World first for sending data using quantum cryptography
Oct 08, 2008 |
4.4 / 5 (64) |
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(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 ...
Single-photon source may meet the needs of quantum communication systems
Nov 09, 2006 |
3.2 / 5 (85) |
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One of the largest challenges for building quantum communications networks involves having single photons, which are needed to ensure the security and efficiency of quantum systems. With an adequate supply ...
Entanglement on demand
Apr 07, 2008 |
4.5 / 5 (57) |
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One of the problems in quantum information processing is inefficiency. Photon entanglement is generally considered a leading candidate for quantum computing (it is used for teleportation and cryptography), but right now it ...
Resonance: A Life of Music, Physics, and Faith
Physics /
Jan 04, 2006 |
4.7 / 5 (54) |
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Vanderbilt physics professor Norman Tolk is passionate about music, physics and faith.
Segment of a 'Quantum Repeater' Demonstrated
Apr 09, 2007 |
4.6 / 5 (53) |
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Physicists at the California Institute of Technology have succeeded for the first time in the distribution of "entanglement" in a way that could lead to long-distance quantum communications, scalable quantum networks, and ...
Physicists boost 'entanglement' of atom pairs
Oct 18, 2006 |
4.5 / 5 (51) |
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Physicists at the Commerce Department's National Institute of Standards and Technology have taken a significant step toward transforming entanglement--an atomic-scale phenomenon described by Albert Einstein ...
Bright future for nanowire light source
Jun 28, 2007 |
4.5 / 5 (51) |
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A bio-friendly nano-sized light source capable of emitting coherent light across the visible spectrum, has been invented by a team of researchers with the U.S. Department of Energy’s Lawrence Berkeley National ...
Reconstructed WW II Code Cracker Colossus Defeated
Nov 16, 2007 |
4.7 / 5 (45) |
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A monumental achievment in reconstructing Colossus the first code cracker computer used by Allied forces in World War II. In a timed contest between Colossus and the modern PC Colossus was defeated by a modern ...
Artificial atoms make microwave photons countable
Feb 01, 2007 |
4.8 / 5 (42) |
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Using artificial atoms on a chip, Yale physicists have taken the next step toward quantum computing by demonstrating that the particle nature of microwave photons can now be detected, according to a report ...
Hackers beware -- new technique uses photons, physics to foil codebreakers
Physics /
Feb 22, 2006 |
4.7 / 5 (41) |
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For governments and corporations in the business of transmitting sensitive data such as banking records or personal information over fibre optic cables, a new system demonstrated by University of Toronto researchers offers ...
