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Tunable Spin Dynamics with Ultracold Polar Molecules

ORAL · Invited

Abstract

Ultracold molecules enable exploration of many-body physics due to their highly tunable dipolar interactions. Here, I will review our recent observations of out-of-equilibrium spin dynamics with polar molecules. With spin encoded in the lowest rotational states of the molecules, we realized a generalized t-J model with dipolar interactions [1] . We explored the role of Ising and spin-exchange couplings tuned with dc electric fields and the effect of motion regulated by optical lattices on Ramsey contrast decay. Theoretical understanding of the experimental measurements will also be discussed. Further, we realized XXZ spin models with Floquet engineering [2] and verified that they produced similar dynamics as those controlled by dc electric fields. We additionally used Floquet engineering to realize a two-axis twisting Hamiltonian, inaccessible with static fields, and studied its mean-field dynamics. This work sets the stage for future explorations of exotic spin Hamiltonians with the tunability of molecular platforms.

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Presenters

  • Annette N Carroll

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

Authors

  • Annette N Carroll

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

  • Henrik Hirzler

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

  • Calder Miller

    CU Boulder

  • David Wellnitz

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

  • Sean R Muleady

    Joint Center for Quantum Information and Computer Science

  • Junyu Lin

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

  • Krzysztof P Zamarski

    Institut für Experimentalphysik und Zentrum für Quantenphysik, Universität Innsbruck, University of Colorado

  • Reuben R Wang

    JILA, University of Colorado Boulder, and NIST, JILA

  • Haoyang Gao

    Harvard University

  • Hengyun Zhou

    Harvard University & QuEra Computing

  • Mikhail D Lukin

    Harvard University

  • John L Bohn

    University of Colorado, Boulder

  • Ana Maria Rey

    University of Colorado, Boulder, UC Boulder/JILA, JILA CU Boulder, CU Boulder, JILA

  • Jun Ye

    CU Boulder, JILA, CU Boulder, JILA, JILA, NIST and University of Colorado Boulder