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Photoinduced Two-Body Loss of Ultracold Molecules

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PhysRevLett.123.123402.pdf

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Author(s)
Christianen, Arthur
•
Zwierlein, Martin W
•
Groenenboom, Gerrit C
•
Karman, Tijs
Date Issued
2019
Journal
Physical Review Letters
Publisher
American Physical Society (APS)
Version
Final published version
Abstract
© 2019 American Physical Society. The lifetime of nonreactive ultracold bialkali gases was conjectured to be limited by sticky collisions amplifying three-body loss. We show that the sticking times were previously overestimated and do not support this hypothesis. We find that electronic excitation of NaK+NaK collision complexes by the trapping laser leads to the experimentally observed two-body loss. We calculate the excitation rate with a quasiclassical, statistical model employing ab initio potentials and transition dipole moments. Using longer laser wavelengths or repulsive box potentials may suppress the losses.
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DOI of Published Version
10.1103/PHYSREVLETT.123.123402
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