Observation of an analogue to the Cosmic Hubble Friction in a Bose Einstein Condensate

ORAL

Abstract

We have simulated the cosmological Hubble friction using a toroidal Bose-Einstein condensate (BEC) of 23Na atoms. Where scalar fields in a BEC (such as phonons) have behavior analogous to cosmological scalar fields. We have observed both damping and growth of the phonon field when the toroidal BEC is expanded or contracted respectively. This is analogous to the damping or enhancement of cosmological fields due to Hubble friction. Furthermore, the measured strength of the Hubble friction is in agreement with recently published theory. In addition, we have also performed a systematic study of the Doppler shifts due to the phonon dynamics.

*NIST, University fo Maryland

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Publication: In preparation.

Presenters

  • Swarnav Banik

    • University of Maryland, College Park

Authors

  • Swarnav Banik

    • University of Maryland, College Park

  • Monica Galan

    • Joint Quantum Institute, University of Maryland College Park

  • Hector Martinez

    • Joint Quantum Institute, University of Maryland College Park

  • Madison J Anderson

    • University of Maryland, College Park
    • Joint Quantum Institute, University of Maryland College Park

  • Stephen Eckel

    • NIST, Gaithersburg, MD

  • Ian Spielman

    • University of Maryland, College Park

  • Gretchen K Campbell

    • National Institute of Standards and Technology