Nicolas Gisin, physicists, of the University of Geneva, Switzerland reported in Nature that they have made a solid-state device capable of storing protons for as long as 1 microsecond. The quantum-cryptography networks have currently a limited range to a few dozen kilometers because of a lack of a suitable way to store the quantum state of photons. This invention will help in the development of light-based quantum-cryptography networks.
“Photons are very fragile,” Gisin says. “We are now able to play with a photon, put it in a quantum fridge, and retrieve it a bit later.”
Raymond Laflamme, director of the Institute for Quantum Computing at the University of Waterloo, in Canada, called the Swiss work “an important stepping stone for quantum communication, a critical building block on which to build quantum repeaters, the missing link to make quantum communication global and pervasive.”
Read more on IEEE Spectrum
Physicists Invent a Chip That Stores a Photon’s Quantum State
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George Bagropoulos
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on December 18, 2008
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