single photons tagged posts

New Quantum Device Generates Single Photons and Encodes Information

2023-08-24
Formed within wells indented into the stack of two different layered materials, a monolayer semiconductor and an anti-ferromagnetic crystal, the chiral quantum light emissions rise up out of the material and could be used for quantum information and communication applications.

A new approach to quantum light emitters generates a stream of circularly polarized single photons, or particles of light, that may be useful for a range of quantum information and communication applications. A Los Alamos National Laboratory team stacked two different atomically thin materials to realize this chiral quantum light source.

“Our research shows that it is possible for a monolayer semiconductor to emit circularly polarized light without the help of an external magnetic field,” said Han Htoon, scien...

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Breakthrough Technology to Improve Cyber Security using Photons as Quantum information carriers

Photons are generated simultaneously in pairs, each in one of the photon streams. The detection of photons in one stream indicates the timing information of those in the other. Using this information, a proper timing control is dynamically applied to those photons so they appear at regular intervals. This new technique increases the rate of photons at the regular interval, which is extremely useful for quantum secure communication and quantum photonic computation. Credit: University of Sydney

Photons are generated simultaneously in pairs, each in one of the photon streams. The detection of photons in one stream indicates the timing information of those in the other. Using this information, a proper timing control is dynamically applied to those photons so they appear at regular intervals. This new technique increases the rate of photons at the regular interval, which is extremely useful for quantum secure communication and quantum photonic computation. Credit: University of Sydney

The interdisciplinary research is set to revolutionize our ability to exchange data securely – along with advancing quantum computing, which can search large databases exponentially faster...

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