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.

*This material is based upon work supported by the National Science Foundation grant no. QLCI OMA-2016244. Additional support is acknowledged from the US Department of Energy, Office of Science, National Quantum Information Science Research Centers, Quantum Systems Accelerator, ARO and AFOSR MURIs, the JILA Physics Frontier Center grant no. PHY-2317149, the National Science Foundation grant no. PHY-2110327, the ARO single investigator Award No. W911NF-24-1-0128, and the National Institute of Standards and Technology. H.G., H.Z., and M.D.L acknowledge support from the Center for Ultracold Atoms, an NSG Physics Frontiers Center. A.N.C acknowledges support from the National Science Foundation Graduate Research Fellowship under grant no. DGE 2040434. C.M. acknowledges support from the Department of Defense through the NDSEG Graduate Fellowship. S.R.M. acknowledges support from the National Science Foundation under grant no. QLCI OMA-2120757. K.P.Z. acknowledges support from the Austrian Science Fund (FWF) under grant no. W1259-N27.78

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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
    • JILA, University of Colorado Boulder, and NIST

  • 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

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

  • Jun Ye

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