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arXiv · 1711.08540

Imaging optical frequencies with 100 $\mu$Hz precision and 1.1 $\mu$m resolution

G. Edward Marti·Ross B. Hutson·Akihisa Goban·Sara L. Campbell·Nicola Poli·Jun Ye
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Abstract

We implement imaging spectroscopy of the optical clock transition of lattice-trapped degenerate fermionic Sr in the Mott-insulating regime, combining micron spatial resolution with submillihertz spectral precision. We use these tools to demonstrate atomic coherence for up to 15 s on the clock transition and reach a record frequency precision of $2.5\times 10^{-19}$. We perform the most rapid evaluation of trapping light shifts and record a 150 mHz linewidth, the narrowest Rabi line shape observed on a coherent optical transition. The important emerging capability of combining high-resolution imaging and spectroscopy will improve the clock precision, and provide a path towards measuring many-body interactions and testing fundamental physics.

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G. Edward Marti, Ross B. Hutson, Akihisa Goban, Sara L. Campbell, Nicola Poli, Jun Ye. 2017-11-23. Imaging optical frequencies with 100 $\mu$Hz precision and 1.1 $\mu$m resolution. https://doi.org/10.1103/physrevlett.120.103201

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