Imaging Optical Frequencies with 100 μ Hz Precision and 1.1 μ m Resolution
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 ×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.
- Publication:
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Physical Review Letters
- Pub Date:
- March 2018
- DOI:
- 10.1103/PhysRevLett.120.103201
- arXiv:
- arXiv:1711.08540
- Bibcode:
- 2018PhRvL.120j3201M
- Keywords:
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- Physics - Atomic Physics;
- Condensed Matter - Quantum Gases;
- Quantum Physics
- E-Print:
- 5 pages, plus 3 page supplemental material