Deviation from Universality in Collisions of Ultracold [superscript 6] Li[subscript 2] Molecules
Name
Wang-2013-Deviation from universality in collisions of ultracold Li26 molecules.pdf
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Author(s)
Heo, Myoung-Sun
Rvachov, Timur M.
Cotta, Dylan Alain
Ketterle, Wolfgang
Wang, Tout Taotao
Date Issued
April 2013
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Wang, Tout T., Myoung-Sun Heo, Timur M. Rvachov, Dylan A. Cotta, and Wolfgang Ketterle. Deviation from Universality in Collisions of Ultracold ^{6}Li_{2} Molecules. Physical Review Letters 110, no. 17 (April 2013). © 2013 American Physical Society
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Final published version
Abstract
Collisions of [superscript 6]Li[subscript 2] molecules with free [superscript 6]Li atoms reveal a striking deviation from universal predictions based on long-range van der Waals interactions. Li[subscript 2] closed-channel molecules are formed in the highest vibrational state near a narrow Feshbach resonance and decay via two-body collisions with Li[subscript 2], Li, and Na. For Li[subscript 2]+Li[subscript 2] and Li[subscript 2]+Na, the decay rates agree with the universal predictions of the quantum Langevin model. In contrast, the rate for Li[subscript 2]+Li is exceptionally small, with an upper bound 10 times smaller than the universal prediction. This can be explained by the low density of available decay states in systems of light atoms [G. Quéméner, J.-M. Launay, and P. Honvault, Phys. Rev. A 75 050701 (2007)], for which such collisions have not been studied before.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Research Laboratory of Electronics
MIT-Harvard Center for Ultracold Atoms
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.110.173203
