P.D. Gregory
Loss of ultracold 87Rb133Cs molecules via optical excitation of long-lived two-body collision complexes
Gregory, P.D.; Blackmore, J.A.; Bromley, S.L.; Cornish, S.L.
Abstract
We show that the lifetime of ultracold ground-state 87Rb133Cs molecules in an optical trap is limited by fast optical excitation of long-lived two-body collision complexes. We partially suppress this loss mechanism by applying square-wave modulation to the trap intensity, such that the molecules spend 75% of each modulation cycle in the dark. By varying the modulation frequency, we show that the lifetime of the collision complex is 0.53 0.06 ms in the dark. We find that the rate of optical excitation of the collision complex is 3þ4 −2 × 103 W−1 cm2 s−1 for λ ¼ 1550 nm, leading to a lifetime of < 100 ns for typical trap intensities. These results explain the two-body loss observed in experiments on nonreactive bialkali molecules.
Citation
Gregory, P., Blackmore, J., Bromley, S., & Cornish, S. (2020). Loss of ultracold 87Rb133Cs molecules via optical excitation of long-lived two-body collision complexes. Physical Review Letters, 124(16), Article 163402. https://doi.org/10.1103/physrevlett.124.163402
Journal Article Type | Article |
---|---|
Acceptance Date | Mar 27, 2020 |
Online Publication Date | Apr 23, 2020 |
Publication Date | Apr 24, 2020 |
Deposit Date | Feb 11, 2020 |
Publicly Available Date | Apr 24, 2020 |
Journal | Physical Review Letters |
Print ISSN | 0031-9007 |
Electronic ISSN | 1079-7114 |
Publisher | American Physical Society |
Peer Reviewed | Peer Reviewed |
Volume | 124 |
Issue | 16 |
Article Number | 163402 |
DOI | https://doi.org/10.1103/physrevlett.124.163402 |
Public URL | https://durham-repository.worktribe.com/output/1276934 |
Related Public URLs | https://arxiv.org/abs/2002.04431 |
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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.
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