Transport in Floquet-Bloch Bands

C. J. Fujiwara, Kevin Singh, Zachary A. Geiger, Ruwan Senaratne, Shankari V. Rajagopal, Mikhail Lipatov, and David M. Weld
Phys. Rev. Lett. 122, 010402 – Published 8 January 2019

Abstract

We report Floquet band engineering of long-range transport and direct imaging of Floquet-Bloch bands in an amplitude-modulated optical lattice. In one variety of Floquet-Bloch bands we observe tunable rapid long-range high-fidelity transport of a Bose condensate across thousands of lattice sites. Quenching into an opposite-parity Floquet-hybridized band allows Wannier-Stark localization to be controllably turned on and off using modulation. A central result of this work is the use of transport dynamics to demonstrate direct imaging of a Floquet-Bloch band structure. These results demonstrate that transport in dynamical Floquet-Bloch bands can be mapped to transport in quasistatic effective bands, opening a path to cold atom quantum emulation of ultrafast multiband electronic dynamics.

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  • Received 15 October 2018

DOI:https://doi.org/10.1103/PhysRevLett.122.010402

© 2019 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & OpticalCondensed Matter, Materials & Applied Physics

Authors & Affiliations

C. J. Fujiwara*, Kevin Singh*, Zachary A. Geiger, Ruwan Senaratne, Shankari V. Rajagopal, Mikhail Lipatov, and David M. Weld

  • University of California and California Institute for Quantum Emulation, Santa Barbara, California 93105, USA

  • *C. J. F. and K. S. contributed equally to this work.
  • weld@ucsb.edu

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Issue

Vol. 122, Iss. 1 — 11 January 2019

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