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).

–

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