R.V. Brooks
Preparation of one 87Rb and one 133Cs atom in a single optical tweezer
Brooks, R.V.; Spence, S.; Guttridge, A.; Alampounti, A.; Rakonjac, A.; McArd, L.A.; Hutson, J.M.; Cornish, S.L.
Authors
S. Spence
A. Guttridge
A. Alampounti
A. Rakonjac
L.A. McArd
Professor Jeremy Hutson j.m.hutson@durham.ac.uk
Professor
Professor Simon Cornish s.l.cornish@durham.ac.uk
Professor
Abstract
We report the preparation of exactly one 87Rb atom and one133Cs atom in the same optical tweezer as the essential first step towards the construction of a tweezer array of individually trapped 87Rb133Cs molecules. Through careful selection of the tweezer wavelengths, we show how to engineer species-selective trapping potentials suitable for high-fidelity preparation of Rb + Cs atom pairs. Using a wavelength of 814 nm to trap Rb and 938 nm to trap Cs, we achieve loading probabilities of 0.508(6) for Rb and 0.547(6) for Cs using standard red-detuned molasses cooling. Loading the traps sequentially yields exactly one Rb and one Cs atom in 28.4(6) % of experimental runs. Using a combination of an acousto-optic deflector and a piezo-controlled mirror to control the relative position of the tweezers, we merge the two tweezers, retaining the atom pair with a probability of 0.99(+0.01)(−0.02).We use this capability to study hyperfine-state-dependent collisions of Rb and Cs in the combined tweezer and compare the measured two-body loss rates with coupled-channel quantum scattering calculations.
Citation
Brooks, R., Spence, S., Guttridge, A., Alampounti, A., Rakonjac, A., McArd, L., …Cornish, S. (2021). Preparation of one 87Rb and one 133Cs atom in a single optical tweezer. New Journal of Physics, 23, Article 065002. https://doi.org/10.1088/1367-2630/ac0000
Journal Article Type | Article |
---|---|
Acceptance Date | May 10, 2021 |
Publication Date | 2021-06 |
Deposit Date | Apr 9, 2021 |
Publicly Available Date | Mar 29, 2024 |
Journal | New Journal of Physics |
Publisher | IOP Publishing |
Peer Reviewed | Peer Reviewed |
Volume | 23 |
Article Number | 065002 |
DOI | https://doi.org/10.1088/1367-2630/ac0000 |
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