Abstract
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 language | English (US) |
|---|---|
| Pages (from-to) | 503-510 |
| Number of pages | 8 |
| Journal | Physical Review A - Atomic, Molecular, and Optical Physics |
| Volume | 57 |
| Issue number | 1 |
| DOIs | |
| State | Published - 1998 |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
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