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Number-resolved imaging of $^{88}$Sr atoms in a long working distance optical tweezer

Jackson, Niamh; Hanley, Ryan; Hill, Matthew; Leroux, Frédéric; Adams, Charles; Jones, Matthew

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Authors

Niamh Jackson

Ryan Hanley

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Matthew Hill matthew.hill2@durham.ac.uk
PGR Student Doctor of Philosophy

Frédéric Leroux



Abstract

We demonstrate number-resolved detection of individual strontium atoms in a long working distance low numerical aperture (NA = 0.26) tweezer. Using a camera based on single-photon counting technology, we determine the presence of an atom in the tweezer with a fidelity of 0.989(6) (and loss of 0.13(5)) within a 200 μs imaging time. Adding continuous narrow-line Sisyphus cooling yields similar fidelity, at the expense of much longer imaging times (30 ms). Under these conditions we determine whether the tweezer contains zero, one or two atoms, with a fidelity > 0.8 in all cases with the high readout speed of the camera enabling real-time monitoring of the number of trapped atoms. Lastly we show that the fidelity can be further improved by using a pulsed cooling/imaging scheme that reduces the effect of camera dark noise.

Citation

Jackson, N., Hanley, R., Hill, M., Leroux, F., Adams, C., & Jones, M. (2020). Number-resolved imaging of $^{88}$Sr atoms in a long working distance optical tweezer. SciPost Physics, 8(3), Article 038. https://doi.org/10.21468/scipostphys.8.3.038

Journal Article Type Article
Acceptance Date Feb 7, 2020
Online Publication Date Mar 10, 2020
Publication Date Mar 31, 2020
Deposit Date Apr 23, 2020
Publicly Available Date Apr 23, 2020
Journal SciPost Physics.
Print ISSN 2542-4653
Publisher SciPost
Peer Reviewed Peer Reviewed
Volume 8
Issue 3
Article Number 038
DOI https://doi.org/10.21468/scipostphys.8.3.038

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