Photoinduced Two-Body Loss of Ultracold Molecules

Christianen, Arthur; Zwierlein, Martin W; Groenenboom, Gerrit C; Karman, Tijs

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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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Persistent DSpace Link

https://hdl.handle.net/1721.1/136417

DOI of Published Version

10.1103/PHYSREVLETT.123.123402