Imaging Optical Frequencies with 100 μHz Precision and 1.1 μm Resolution.
PHYSICAL REVIEW LETTERS(2018)
摘要
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 x 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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关键词
Optical Clocks,Frequency Metrology,Frequency Comparison,Lattice Clocks,Optical Lattices
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