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Alkaline earth atoms in optical tweezers

Cooper, Alexandre and Covey, Jacob P. and Madjarov, Ivaylo S. and Porsev, Sergey G. and Safronova, Marianna S. and Endres, Manuel (2018) Alkaline earth atoms in optical tweezers. Physical Review X, 8 (4). Art. No. 041055. ISSN 2160-3308. doi:10.1103/PhysRevX.8.041055.

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We demonstrate single-shot imaging and narrow-line cooling of individual alkaline-earth atoms in optical tweezers; specifically, strontium trapped in 515.2−nm light. Our approach enables high-fidelity detection of single atoms by imaging photons from the broad singlet transition while cooling on the narrow intercombination line, and we extend this technique to highly uniform two-dimensional tweezer arrays with 121 sites. Cooling during imaging is based on a previously unobserved narrow-line Sisyphus mechanism, which we predict to be applicable in a wide variety of experimental situations. Further, we demonstrate optically resolved sideband cooling of a single atom to near the motional ground state of a tweezer, which is tuned to a magic-trapping configuration achieved by elliptical polarization. Finally, we present calculations, in agreement with our experimental results, that predict a linear-polarization and polarization-independent magic crossing at 520(2) nm and 500.65(50) nm, respectively. Our results pave the way for a wide range of novel experimental avenues based on individually controlled alkaline-earth atoms in tweezers—from fundamental experiments in atomic physics to quantum computing, simulation, and metrology.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper InPhysics : Viewpoint
Cooper, Alexandre0000-0002-8759-9647
Covey, Jacob P.0000-0001-5104-6883
Porsev, Sergey G.0000-0003-0417-2726
Safronova, Marianna S.0000-0002-1305-4011
Endres, Manuel0000-0002-4461-224X
Additional Information:© 2019 Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Received 17 October 2018; revised manuscript received 6 December 2018; published 28 December 2018. We acknowledge A. Kaufman and N. Hutzler for insightful discussions. We acknowledge the technical contributions of Alexander Baumgärtner and Brian Timar. We acknowledge funding provided by the Institute for Quantum Information and Matter, an NSF Physics Frontiers Center (NSF Grant No. PHY-1733907), by an NSF CAREER grant under Grant No. 1753386, by the NASA/JPL President’s and Director’s Fund, by the Sloan Foundation, and by Fred Blum. A. C. acknowledges funding from an IQIM Postdoctoral Fellowship. J. P. C. acknowledges funding from a PMA Postdoctoral Prize Fellowship. Theoretical work was performed under the sponsorship of the U.S. Department of Commerce, National Institute of Standards and Technology.
Group:Institute for Quantum Information and Matter
Funding AgencyGrant Number
Institute for Quantum Information and Matter (IQIM)UNSPECIFIED
JPL President and Director's FundUNSPECIFIED
Alfred P. Sloan FoundationUNSPECIFIED
Caltech Division of Physics, Mathematics and AstronomyUNSPECIFIED
National Institute of Standards and Technology (NIST)UNSPECIFIED
Issue or Number:4
Record Number:CaltechAUTHORS:20181203-104933854
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:91399
Deposited By: Tony Diaz
Deposited On:03 Dec 2018 19:34
Last Modified:16 Nov 2021 03:41

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