Measurement of Excitations in the Stripe Phase of a Spin-Orbit Coupled Bose-Einstein Condensate

ORAL

Abstract

Recent experimental progress with quantum gases is providing new avenues for the study of exotic stripe phases and supersolid-like properties from a variety of different perspectives. In our lab, we generate a superfluid stripe phase by combining Raman induced spin-orbit coupling with an additional weak optical lattice. We study the excitation spectrum by applying Raman detuning quenches and observing the resulting spin polarization. We characterize the zero-momentum bandgap as a function of the optical lattice coupling strength and find good agreement between the experimental observations and numerical simulations. This work provides a direct experimental confirmation of the gapped pseudo-Goldstone spectrum and opens the door for further investigations into the excitation dynamics of a superfluid stripe phase.

*We gratefully acknowledge funding from NSF under grant PHY-1912540.

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Presenters

  • Md Kamrul Hoque Ome

    • Washington State Univ
    • Department of Physics and Astronomy, Washington State University, Pullman, Washington 99164-2814, USA

Authors

  • Md Kamrul Hoque Ome

    • Washington State Univ
    • Department of Physics and Astronomy, Washington State University, Pullman, Washington 99164-2814, USA

  • Annesh Mukhopadhyay

    • Washington State University
    • Department of Physics and Astronomy, Washington State University, Pullman, Washington 99164-2814, USA

  • Sean Mossman

    • Washington State Univ
    • Department of Physics and Astronomy, Washington State University, Pullman, Washington 99164-2814, USA

  • Xiwang Luo

    • University of Texas at Dallas

  • Chuanwei Zhang

    • University of Texas at Dallas

  • Peter W Engels

    • Washington State University
    • Washington State Univ
    • Department of Physics and Astronomy, Washington State University, Pullman, Washington
    • Department of Physics and Astronomy, Washington State University, Pullman, Washington 99164-2814, USA