Spin-Orbit Suppression of Cold Inelastic Collisions of Aluminum and Helium
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Connoly-2013-Spin-Orbit Suppression of Cold Inelastic Collisions of Aluminum and Helium.pdf
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Author(s)
Connolly, Colin B.
Au, Yat Shan
Chae, Eunmi
Tscherbul, Timur V.
Buchachenko, Alexei A.
Lu, Hsin-I
Ketterle, Wolfgang
Doyle, John M.
Date Issued
April 2013
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Connolly, Colin Bryant, Yat Shan Au, Eunmi Chae, et al. 2013 "Spin-Orbit Suppression of Cold Inelastic Collisions of Aluminum and Helium." Physical Review Letters 110(17), [5 pages].
Version
Final published version
Abstract
We present a quantitative study of suppression of cold inelastic collisions by the spin-orbit interaction. We prepare cold ensembles of >10[superscript 11] Al([superscript 2]P[subscript 1/2]) atoms via cryogenic buffer-gas cooling and use a single-beam optical pumping method to measure their magnetic (m[subscript J]-changing) and fine-structure (J-changing) collisions with [superscript 3]He atoms at millikelvin temperatures over a range of magnetic fields from 0.5 to 6 T. The experimentally determined rates are in good agreement with the functional form predicted by quantum scattering calculations using ab initio potentials. This comparison provides direct experimental evidence for a proposed model of suppressed inelasticity in collisions of atoms in [superscript 2]P[subscript 1/2] states [T. V. Tscherbul et al., Phys. Rev. A 80 040701(R) (2009)], which may allow for sympathetic cooling of other [superscript 2]P[subscript 1/2] atoms (e.g., In, Tl and metastable halogens).
MIT Department
Massachusetts Institute of Technology. Department of Physics
MIT-Harvard Center for Ultracold Atoms
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.110.173202
