Motional Ground State Cooling Outside the Lamb-Dicke Regime
Abstract
We report Raman sideband cooling of a single sodium atom to its three-dimensional motional ground state in an optical tweezer. Despite a large Lamb-Dicke parameter, high initial temperature, and large differential light shifts between the excited state and the ground state, we achieve a ground state population of 81(4)% after 100 ms of cooling, for the 85% of atoms that survive cooling and re-imaging. Our technique includes addressing high-order sidebands, where several motional quanta are removed by a single laser pulse, and fast modulation of the optical tweezer intensity. We demonstrate that Raman sideband cooling to the 3D motional ground state is possible, even without tight confinement and low initial temperature.
Additional Information
Submitted on 10 Aug 2017. Dated: August 11, 2017. We thank J. D. Hood for discussions. This work is supported by the Arnold and Mabel Beckman Foundation, the AFOSR Young Investigator Program, the NSF through the CUA, and the Alfred P. Sloan Foundation.Attached Files
Submitted - 1708.03296.pdf
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Additional details
- Eprint ID
- 80954
- Resolver ID
- CaltechAUTHORS:20170830-103658699
- Arnold and Mabel Beckman Foundation
- Air Force Office of Scientific Research (AFOSR)
- Harvard-MIT Center for Ultracold Atoms
- Alfred P. Sloan Foundation
- Created
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2017-09-05Created from EPrint's datestamp field
- Updated
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2023-06-02Created from EPrint's last_modified field