Collapse and revival of the monopole mode of a Bose-Einstein condensate in a spherical harmonic trap

ORAL

Abstract

We observe the relaxation of the monopole (breathing) mode of a rubidium-87 Bose-Einstein condensate (BEC) in a highly spherical harmonic trap [1] at finite temperature. The experiments show a collapse and revival of the condensate oscillation, consistent with numerical simulations of the system using the Zaremba-Nikuni-Griffin methodology for the nonequilibrium dynamics of BECs [2]. The beating signal is shown to be due to the resonant excitation of the ``out-of-phase'' normal mode of the condensate and thermal cloud. [1] D. S. Lobser, A. E. S. Barentine, E. A. Cornell, and H. J. Lewandowski, Nat. Phys. 11, 1009 (2015). [2] E. Zaremba, T. Nikuni, and A. Griffin, J. Low Temp. Phys. 116, 277 (1999).

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Authors

  • Victor Colussi

    • JILA, NIST and Department of Physics, University of Colorado, Boulder, Colorado

  • Cameron Straatsma

    • JILA and Department of Electrical, Computer, and Energy Engineering,?University of Colorado, Boulder, Colorado

  • Matthew Davis

    • JILA, NIST and Department of Physics, University of Colorado, Boulder, Colorado

  • Dan Lobser

    • JILA, NIST and Department of Physics, University of Colorado, Boulder, Colorado

  • Murray Holland

    • JILA, NIST and Department of Physics, University of Colorado, Boulder, Colorado

  • Dana Anderson

    • JILA/Univ of Colorado - Boulder
    • JILA, NIST and Department of Physics, University of Colorado, Boulder, Colorado
    • Univ of Colorado - Boulder/JILA

  • Eric Cornell

    • JILA, NIST and CU, and Phys. Dept., University of Colorado, Boulder
    • JILA, NIST and Department of Physics, University of Colorado, Boulder, Colorado
    • JILA, NIST and Department of Physics University of Colorado, Boulder CO
    • JILA, NIST and University of Colorado, Boulder
    • JILA, NIST and University of Colorado, and Department of Physics, University of Colorado, Boulder CO 80309-0440, USA

  • Heather Lewandowski

    • JILA, NIST and Department of Physics, University of Colorado, Boulder, Colorado