Two-Body Loss of Ultracold Nonreactive Bosonic (NaRb)-Na-23-Rb-87 and (NaK)-Na-23-K-39 Molecules

Year: 2021

Authors: Gersema P.; Voges K.K.; Meyer zum Alten Borgloh M.; Koch L.; Hartmann T.; Zenesini A.; Ospelkaus S.; Lin JY.; He JY; Wang D.

Autors Affiliation: Institut fur Quantenoptik, Leibniz Universitdt Hannover, Hannover, 30167, Germany; INO-CNR BEC Center, Dipartimento di Fisica, Università di Trento and TIFPA-INFN, Povo, 38123, Italy; Department of Physics, Chinese University of Hong Kong, Hong Kong, Hong Kong

Abstract: We probe photoinduced loss for chemically stable bosonic (NaRb)-Na-23-Rb-87 and (NaK)-Na-23-K-39 molecules in chopped optical dipole traps, where the molecules spend a significant time in the dark. We expect the effective two-body decay to be significantly suppressed due to the small expected complex lifetimes of about 13 and 6 mu s for (NaRb)-Na-23-Rb-87 and (NaK)-Na-23-K-39, respectively. However, instead we do not observe any suppression of the two-body loss in parameter ranges where large loss suppressions are expected. We believe these unexpected results are most probably due to drastic underestimation of the complex lifetime by at least 1-2 orders of magnitude.


Volume: 127 (16)      Pages from: 163401-1  to: 163401-6

KeyWords: Ultracold Molecules
DOI: 10.1103/PhysRevLett.127.163401