Floquet Phase Transitions in Strongly-Driven Optical Lattices

ORAL

Abstract

Ultracold neutral atoms in driven optical lattices provide a rich test bed for exploring non-equilibrium physics. We report on experimental characterization of a Floquet phase diagram using ultracold bosonic lithium in a strongly-driven optical lattice. As the drive frequency and amplitude are tuned,we observe a sharp transition line between stable and unstable behavior. For deep lattices and zero interactions, this transition corresponds to the classically-expected threshold for chaos. We explore the effect of Feshbach-tunable interactions and lattice-tunable tunneling on the properties of this Floquet phase diagram.

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Presenters

  • Kurt Fujiwara

    Physics, University of California - Santa Barbara, Physics, University of California Santa Barbara

Authors

  • Kurt Fujiwara

    Physics, University of California - Santa Barbara, Physics, University of California Santa Barbara

  • Kevin Singh

    Physics, University of California - Santa Barbara, Physics, University of California Santa Barbara

  • Zachary Geiger

    Physics, University of California - Santa Barbara, Physics, University of California Santa Barbara

  • Mikhail Lipatov

    Physics, University of California - Santa Barbara, Physics, University of California Santa Barbara

  • Ethan Simmons

    Physics, University of California - Santa Barbara, Physics, University of California Santa Barbara

  • David Weld

    Physics, Univ of California - Santa Barbara, Physics, University of California - Santa Barbara, Physics, University of California, Santa Barbara, Physics, University of California Santa Barbara, Physics, UC Santa Barbara