Tag "quantum" archive

Breakthrough in Quantum Cryptography Demonstrates “Perfectly Secure” Bit Commitment

Perfectly Secure Bit Commitment

For the first time, researchers have demonstrated perfectly secure bit commitment, sending encrypted data between pairs of sites in Geneva and Singapore. Continue reading “Breakthrough in Quantum Cryptography Demonstrates “Perfectly Secure” Bit Commitment” »

Physicists Create and Control a Large Quantum System Built on Photons

Quantum Mechanics by onilukos

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A new study from Yale University shows that scientists can create and control a large quantum mechanical system built on photons, suggesting that they might be able to expand the role of photons in quantum information systems. Light might be able to play a bigger, more versatile role in the future of quantum computing, according to new research by Yale University scientists. Continue reading “Physicists Create and Control a Large Quantum System Built on Photons” »

Quantum coherence in diamond and fluorescence thermometry

toyli pnas figure1

Thermometry – the measurement of temperature – is critical to a wide range of applications, including many industrial processes, biomedical monitoring, and environmental regulatory systems. However, measuring temperature in the presence of high RF (radio frequency) or other electromagnetic fields – such as are found in aerospace, automotive and medical systems – cannot be accomplished using electrical thermometric probes. Continue reading “Quantum coherence in diamond and fluorescence thermometry” »

A New Way to Trap Light: Phenomenon Could Lead to New Types of Lasers and Sensors

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There are several ways to "trap" a beam of light -- usually with mirrors, other reflective surfaces, or high-tech materials such as photonic crystals. But now researchers at MIT have discovered a new method to trap light that could find a wide variety of applications.

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All-optical transistor

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Optical computing — using light rather than electricity to perform calculations — could pay dividends for both conventional computers and quantum computers, largely hypothetical devices that could perform some types of computations exponentially faster than classical computers. An optical switch that can be turned on by a single photon could point toward new designs for both classical and quantum computers.

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