Collapses and revivals of collective excitations in trapped Bose condensates

R. Graham, D. F. Walls, M. J. Collett, M. Fliesser, E. M. Wright

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


We present a quantum theory of low-lying excitations in a trapped Bose condensate with finite particle numbers. We find that even at zero temperature condensate number fluctuations and/or fluctuations of the excitation frequency due to quantum uncertainties of the mode occupation lead to a collapse of the collective modes due to dephasing. Coherent revivals of the collective excitations are predicted on a much longer time scale. Depletion of collective modes due to second-harmonic generation is discussed.

Original languageEnglish (US)
Pages (from-to)503-510
Number of pages8
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number1
StatePublished - 1998

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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