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.

*The authors acknowledge funding from the ARO (PECASE W911NF1410154), the NSF (CAREER award 1555313), the ONR (N00014-14-1-0805), and the President’s Research Catalyst Award (CA-15-327861) from the UCOP.

–

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