Controlling anisotropic dipolar interaction with shielding resonance in a 3D molecular quantum gas

ORAL

Abstract

Suppressing the detrimental two-body loss and obtaining tunability of the elastic dipolar interaction have long been an active quest in the field of ultracold polar molecules.

 

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.

 

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Presenters

  • Jun-Ru Li

    JILA and University of Colorado Boulder, JILA, University of Colorado Boulder, JILA

Authors

  • Jun-Ru Li

    JILA and University of Colorado Boulder, JILA, University of Colorado Boulder, JILA

  • William G Tobias

    JILA and University of Colorado Boulder, JILA, University of Colorado Boulder, University of Colorado, Boulder

  • Kyle Y Matsuda

    JILA and University of Colorado Boulder, JILA, University of Colorado Boulder, University of Colorado, Boulder

  • Calder Miller

    JILA and University of Colorado Boulder, JILA, University of Colorado Boulder

  • Giacomo Valtolina

    JILA and University of Colorado Boulder, JILA, University of Colorado Boulder, University of Colorado, Boulder

  • Luigi de Marco

    JILA and University of Colorado Boulder, JILA, University of Colorado Boulder, JILA

  • Reuben R Wang

    JILA and University of Colorado Boulder, JILA

  • Lucas Lassablière

    Université Paris-Saclay, CNRS, Laboratoire Aimé Cotton, Université Paris-Saclay, CNRS, Laboratoire Aimé Cotton, Orsay, France

  • Goulven Quéméner

    Université Paris-Saclay, CNRS, Laboratoire Aimé Cotton, Université Paris-Saclay, CNRS, Laboratoire Aimé Cotton, Orsay, France, CNRS

  • John L Bohn

    JILA and University of Colorado Boulder, University of Colorado, JILA, NIST, and Department of Physics, University of Colorado, Boulder, USA, University of Colorado, Boulder

  • Jun Ye

    JILA and University of Colorado Boulder, JILA, University of Colorado, Boulder, University of Colorado, Boulder, JILA, NIST, and University of Colorado Boulder, JILA, University of Colorado Boulder, JILA, University of Colorado and National Institute of Standards and Technology, and Department of Physics, University of Colorado, Boulder, Colorado 80309, USA, JILA, National Institute of Standards and Technology and Department of Physics, University of Colorado, Boulder, Colorado 80309, USA, JILA, NIST, and Department of Physics, University of Colorado, Boulder, JILA, NIST, and University of Colorado, Boulder, JILA, NIST, and University of Colorado at Boulder