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Are ultracold molecular collisions sticky? [dataset] Open Access

Understanding and controlling collisions is crucial to the burgeoning field of ultracold molecules. All experiments so far have observed fast loss of molecules from the trap. However, the dominant mechanism for collisional loss is not well understood when there are no allowed 2-body loss processes. Here we experimentally investigate collisional losses of nonreactive ultracold RbCs molecules, and compare our findings with the sticky collision hypothesis that pairs of molecules form long-lived collision complexes. We demonstrate that loss of molecules occupying their rotational and hyperfine ground state is best described by second-order rate equations, consistent with the expectation for complex-mediated collisions, but that the rate is lower than the limit of universal loss. The loss is insensitive to magnetic field but increases for excited rotational states. We demonstrate that dipolar effects lead to significantly faster loss for an incoherent mixture of rotational states.

Descriptions

Resource type
Dataset
Contributors
Creator: Gregory, Philip David 1
Creator: Frye, Matthew 1
1 Durham University, UK
Funder
Engineering and Physical Sciences Research Council
Research methods
Other description
Keyword
ultracold
molecular
collisions
sticky collisions
polar molecules
RbCs
Subject
Location
Language
Cited in
arxiv:1904.00654v2
Identifier
ark:/32150/r270795768f
doi:10.15128/r270795768f
Rights
Creative Commons Attribution 4.0 International (CC BY)

Publisher
Durham University
Date Created

File Details

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P.D. Gregory
Date Uploaded
Date Modified
24 February 2020, 16:02:14
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File format: zip (ZIP Format)
Mime type: application/zip
File size: 14506894
Last modified: 2019:05:23 17:37:56+01:00
Filename: DOI Information.zip
Original checksum: 393c0623acd1c6e881a63b4135973f65
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User N. Syrotiuk has updated Are ultracold molecular collisions sticky? [dataset] almost 5 years ago
User N. Syrotiuk has updated Are ultracold molecular collisions sticky? [dataset] almost 5 years ago
User N. Syrotiuk has updated Are ultracold molecular collisions sticky? [dataset] almost 5 years ago
User P.D. Gregory has updated Supporting Data: Are ultracold molecular collisions sticky? almost 5 years ago
User P.D. Gregory has updated Supporting Data: Are ultracold molecular collisions sticky? almost 5 years ago
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User P.D. Gregory has deposited DOI Information.zip almost 5 years ago