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Single-photon beam could lead to quantum computers

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In a significant step toward quantum computing, scientists at MIT and Harvard University have identified a method that converts laser beams into streams of single photons in a controlled way. The discovery could lead to new quantum devices such as quantum gates, where a single photon switches another photon’s direction of travel or polarization. It is difficult to control photons because the interaction between two photons is very weak at best, said Vladan Vuletic, the Lester Wolfe professor of physics at MIT. Encouraging such interactions requires atoms that interact strongly with...Read full article

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    Published: October 2012
    Glossary
    photonics
    The technology of generating and harnessing light and other forms of radiant energy whose quantum unit is the photon. The science includes light emission, transmission, deflection, amplification and detection by optical components and instruments, lasers and other light sources, fiber optics, electro-optical instrumentation, related hardware and electronics, and sophisticated systems. The range of applications of photonics extends from energy generation to detection to communications and...
    all-optical quantum information processing systemAmericasatomsCommunicationscontrolling photonsEITelectromagnetically induced transparencyHarvard Universitylaser beamsMassachusettsMITOfer FirstenbergOpticsphoton switchesphotonicsphotonsquantum computingquantum devicesquantum gatesResearch & Technologyrubidium atomsRydberg statesingle photon streamTech PulseVladan VuleticLasers

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