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Motional Ground State Cooling Outside the Lamb-Dicke Regime

Yu, Yichao and Hutzler, Nicholas R. and Zhang, Jessie T. and Liu, Lee R. and Rosenband, Till and Ni, Kang-Kuen (2017) Motional Ground State Cooling Outside the Lamb-Dicke Regime. . (Submitted)

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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.

Item Type:Report or Paper (Discussion Paper)
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URLURL TypeDescription Paper
Hutzler, Nicholas R.0000-0002-5203-3635
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.
Funding AgencyGrant Number
Arnold and Mabel Beckman FoundationUNSPECIFIED
Air Force Office of Scientific Research (AFOSR)UNSPECIFIED
Harvard-MIT Center for Ultracold AtomsUNSPECIFIED
Alfred P. Sloan FoundationUNSPECIFIED
Record Number:CaltechAUTHORS:20170830-103658699
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:80954
Deposited By: Ruth Sustaita
Deposited On:05 Sep 2017 17:51
Last Modified:03 Oct 2019 18:37

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