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2000-times repeated imaging of strontium atoms in clock-magic tweezer arrays

Covey, Jacob P. and Madjarov, Ivaylo S. and Cooper, Alexandre and Endres, Manuel (2019) 2000-times repeated imaging of strontium atoms in clock-magic tweezer arrays. Physical Review Letters, 122 (17). Art. No. 173201. ISSN 0031-9007. http://resolver.caltech.edu/CaltechAUTHORS:20190123-112141969

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Abstract

We demonstrate single-atom resolved imaging with a survival probability of 0.99932(8) and a fidelity of 0.99991(1), enabling us to perform repeated high-fidelity imaging of single atoms in tweezers for thousands of times. We further observe lifetimes under laser cooling of more than seven minutes, an order of magnitude longer than in previous tweezer studies. Experiments are performed with strontium atoms in 813.4 nm tweezer arrays, which is at a magic wavelength for the clock transition. Tuning to this wavelength is enabled by off-magic Sisyphus cooling on the intercombination line, which lets us choose the tweezer wavelength almost arbitrarily. We find that a single not retro-reflected cooling beam in the radial direction is sufficient for mitigating recoil heating during imaging. Moreover, this cooling technique yields temperatures below 5 μK, as measured by release and recapture. Finally, we demonstrate clock-state resolved detection with average survival probability of 0.996(1) and average state detection fidelity of 0.981(1). Our work paves the way for atom-by-atom assembly of large defect-free arrays of alkaline-earth atoms, in which repeated interrogation of the clock transition is an imminent possibility.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1103/PhysRevLett.122.173201DOIArticle
https://arxiv.org/abs/1811.06014arXivDiscussion Paper
ORCID:
AuthorORCID
Covey, Jacob P.0000-0001-5104-6883
Additional Information:© 2019 American Physical Society. Received 11 December 2018; published 1 May 2019. We acknowledge funding provided by the Institute for Quantum Information and Matter, an NSF Physics Frontiers Center (NSF Grant No. PHY-1733907). This work was supported by the NSF CAREER award (Grant No. 1753386), the Sloan Foundation, by the NASA/JPL President’s and Director’s Fund, and by Fred Blum. J. P. C. acknowledges support from the PMA Prize postdoctoral fellowship, and A. C. acknowledges support from the IQIM Postdoctoral Scholar fellowship.
Group:IQIM, Institute for Quantum Information and Matter
Funders:
Funding AgencyGrant Number
Institute for Quantum Information and Matter (IQIM)UNSPECIFIED
NSFPHY-1733907
NSFPHY-1753386
Alfred P. Sloan FoundationUNSPECIFIED
JPL President and Director's FundUNSPECIFIED
Fred BlumUNSPECIFIED
Record Number:CaltechAUTHORS:20190123-112141969
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20190123-112141969
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:92429
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:23 Jan 2019 20:02
Last Modified:01 May 2019 21:25

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