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Entanglement Protocol May Improve Synchronization of Atomic Clocks

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In the June 4 issue of Science, physicists at the National Institute of Standards and Technology in Boulder, Colo., report an entanglement setup that promises applications in atomic clocks. The method combines approaches from precision spectroscopy and quantum information to improve the signal-to-noise ratio in the output signal. Using pulses from two ultraviolet lasers, the researchers created a three-particle entangled system of beryllium ions. The ions were exposed to two detuned laser beams that acted as a phase gate for encoding quantum state information. After 2 µs, the scientists...Read full article

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    Published: July 2004
    Glossary
    signal-to-noise ratio
    The ratio of the power in a desired signal to the undesirable noise present in the absence of a signal.
    As We Go To Pressatomic clocksBasic ScienceBreaking NewsNational Institute of Standards and Technologyoutput signalPresstime Bulletinsignal-to-noise ratiospectroscopy

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