A clock that will last forever: Researchers propose a way to build the first space-ti

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    A clock that will last forever: Researchers propose a way to build the first space-time crystal
    September 24, 2012
    by Lynn Yarris

    This proposed space-time crystal shows (a) periodic structures in both space and time with (b) ultracold ions rotating in one direction even at the lowest energy state. Credit: Xiang Zhang group, Berkeley Lab-UC Berkeley

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