Response of Bose-Einstein condensates to external perturbations at finite temperature

@inproceedings{Morgan2004ResponseOB,
  title={Response of Bose-Einstein condensates to external perturbations at finite temperature},
  author={Shafid A Morgan},
  year={2004}
}
We present a theory of the linear response of a Bose-Einstein-condensed gas to external perturbations at finite temperature. The theory developed here is the basis of a recent quantitative explanation of the measurements of condensate excitations and decay rates made at JILA [D. S. Jin et al., Phys. Rev. Lett. 78, 764 (1997)]. The formalism is based on a dynamic, number-conserving, mean-field scheme and is valid in the collisionless limit of well-defined quasiparticles. The theory is gapless… CONTINUE READING
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