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Lattice clocks embrace ytterbium

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Accurate frequency measurements of a narrow optical clock transition in 171Yb atoms trapped in an optical lattice establish this system as a serious contender in the quest to develop increasingly accurate atomic clocks.

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Figure 1: Energy levels of the 171Yb atom, showing the wavelengths and natural linewidths of the optical clock transition and the transitions used for laser cooling.

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Margolis, H. Lattice clocks embrace ytterbium. Nature Photon 3, 557–558 (2009). https://doi.org/10.1038/nphoton.2009.182

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