Coherent control of Anderson localization in phase-modulated quasiperiodic lattices

ORAL

Abstract

We report recent experiments on the coherent control of Anderson localization by phason modulation in a quasiperiodic system. Despite the fact that the phason degree of freedom in the static 1D Aubry-André model doesn't affect the localization transition, we show both theoretically and experimentally that this localization transition can be controlled and destroyed completely by periodic phason modulation, without changing the pseudo-disorder strength. By experimentally observing the in-situ expansion of a BEC in a phase-modulated bichromatic lattice, we map out the rescaling of the effective disorder and observe the destruction of localization, demonstrate its use as a knob for coherent control of localization, and explore a possible protocol for reversing the apparent arrow of time. We elucidate connections between these phenomena and higher-dimensional dynamical localization in integer quantum Hall systems.

*We acknowledge support from the National Science Foundation (QLCI OMA-2016245), Air Force Office of Scientific Research (AFOSR FA9550-20-1-0240), and the Army Research Office (MURI W911NF-17-1-0323, W911NF-20-1-0294). D.M.W. and A.D. acknowledge support from the UCSB NSF Quantum Foundry through the Q-AMASE-i program (DMR-1906325). This material is based in part upon work supported by the U.S. Department of Energy, Office of Science, National Quantum Information Science Research Centers, Quantum Science Center.

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Presenters

  • Yifei Bai

    • University of California, Santa Barbara

Authors

  • Yifei Bai

    • University of California, Santa Barbara

  • Toshihiko Shimasaki

    • University of California, Santa Barbara

  • Esat Kondakci

    • University of California Santa Barbara
    • University of California, Santa Barbara
    • UCSB

  • Peter Dotti

    • University of California, Santa Barbara

  • Jared E Pagett

    • University of California, Santa Barbara
    • UCSB
    • University of California Santa Barbara

  • Max Prichard

    • Princeton University

  • Anna R Dardia

    • University of California, Santa Barbara

  • David M Weld

    • UC Santa Barbara
    • University of California, Santa Barbara