Andrew Ludlow with NIST Ytterbium Lattice Atomic Clocks (IMAGE)
Caption
NIST physicist Andrew Ludlow and colleagues achieved new atomic clock performance records in a comparison of two ytterbium optical lattice clocks. Laser systems used in both clocks are visible in the foreground, and the main apparatus for one of the clocks is located behind Ludlow.
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Burrus/NIST
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