News tagged with individual photons
Quantum calibration paves way for super-secure communication
Nov 17, 2008 |
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(PhysOrg.com) -- A new approach to calibrating quantum mechanical measurement has been developed with particular applications in optics and super-secure quantum communication.
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World's shortest single photon pulse created
Apr 10, 2008 |
4.8 / 5 (18) |
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The world’s shortest light pulse containing just one photon has been produced by Oxford University scientists.
Firing photons makes advance in space communication
Mar 27, 2008 |
4.5 / 5 (31) |
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For the first time, physicists have been able to identify individual returning photons after firing and reflecting them off of a space satellite in orbit almost 1,500 kilometres above the earth. The experiment has proven ...
JQI researchers create entangled photons from quantum dots
Nov 18, 2009 |
4.3 / 5 (8) |
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To exploit the quantum world to the fullest, a key commodity is entanglement—the spooky, distance-defying link that can form between objects such as atoms even when they are completely shielded from one another. Now, physicists ...
Siemens builds a lock made of light: Data transfer using quantum cryptography
Aug 01, 2008 |
4.5 / 5 (14) |
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(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 ...
New Quantum Dot Transistor Counts Individual Photons
Oct 11, 2007 |
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A transistor containing quantum dots that can count individual photons (the smallest particles of light) has been designed and demonstrated at the National Institute of Standards and Technology.
'Plug and Play' Source of Single Photons
Mar 15, 2007 |
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A research group in the UK has crafted a source of single photons – photons emitted one by one – with a convenience and ease of use they liken to “plug and play” computer hardware devices. This is a key step ...
Mass weddings -- NIST's new efficient 2-photon source
Apr 12, 2007 |
3.7 / 5 (3) |
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For a variety of applications in physics and technology, ranging from quantum information theory to telecommunications, it’s handy to have access to pairs of photons created simultaneously, with a chosen energy. ...
Quantum computers take step toward practicality with demonstration of new device
May 09, 2008 |
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Computers based on the powerful properties of quantum mechanics have the potential to revolutionize information technology and security, but for decades they have remained more theoretical than practical, ...
Artificial atoms make microwave photons countable
Feb 01, 2007 |
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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 ...
A sub-femtosecond stop watch for 'photon finish' races
Mar 13, 2008 |
4.6 / 5 (17) |
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Using a system that can compare the travel times of two photons with sub-femtosecond precision, scientists at the Joint Quantum Institute (a partnership of the National Institute of Standards and Technology ...
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