Bulletin of the American Physical Society
52nd Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 66, Number 6
Monday–Friday, May 31–June 4 2021; Virtual; Time Zone: Central Daylight Time, USA
Session Z07: Ultracold Molecules
10:30 AM–12:30 PM,
Friday, June 4, 2021
Chair: Silke Ospelkaus, Leibniz Universität Hannover
Abstract: Z07.00008 : Controlling anisotropic dipolar interaction with shielding resonance in a 3D molecular quantum gas *
11:54 AM–12:06 PM
Live
Presenter:
Jun-Ru Li
(JILA and University of Colorado Boulder)
Authors:
Jun-Ru Li
(JILA and University of Colorado Boulder)
William G Tobias
(JILA and University of Colorado Boulder)
Kyle Y Matsuda
(JILA and University of Colorado Boulder)
Calder Miller
(JILA and University of Colorado Boulder)
Giacomo Valtolina
(JILA and University of Colorado Boulder)
Luigi de Marco
(JILA and University of Colorado Boulder)
Reuben R Wang
(JILA and University of Colorado Boulder)
Lucas Lassablière
(Université Paris-Saclay, CNRS, Laboratoire Aimé Cotton)
Goulven Quéméner
(Université Paris-Saclay, CNRS, Laboratoire Aimé Cotton)
John L Bohn
(JILA and University of Colorado Boulder)
Jun Ye
(JILA and University of Colorado Boulder)
In this work, we demonstrate full control of the dipolar interaction in polar molecules by exploiting the resonant shielding mechanism in 3D. We achieve suppression of two-body loss rates in a bulk molecular gas by a factor of 30 using an external electric field. Meanwhile, strong and elastic dipolar collisions become dominant over the loss. We observe efficient thermalization of the bulk gas mediated by the elastic dipolar interactions. We further map out the anisotropy of the thermalization process, which is a key signature of the dipolar collision. The suppressed loss and strong elastic molecular collisions allow us to perform direct evaporative cooling of a molecular gas in 3D via dipolar interactions. These results elucidate a general mechanism that suppresses the two-body loss while preserving strong dipolar interaction simultaneously.
*The project is funded by ARO-MURI, AFOSR-MURI, DARPA DRINQS, NSFQLCI OMA–2016244, NIST, NSF grant 1806971, and FEW2MANY-SHIELD Project No. ANR-17-CE30-0015 from Agence Nationale de la Recherche.
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