Phys. Rev. A 67, 053614 (2003) [5 pages]Thermalization of an impurity cloud in a Bose-Einstein condensateReceived 18 October 2002; published 28 May 2003 We study the thermalization dynamics of an impurity cloud inside a Bose-Einstein condensate at finite temperature, introducing a suitable Boltzmann equation. Some values of the temperature and of the initial impurity energy are considered. We find that below the Landau critical velocity, the stimulation effects reduce the depletion rate of the macroscopic initial impurity population. For appropriate parameters, the collisions cool the condensate. The maximum cooling per impurity atom is obtained with multiple collisions. A cooling method is outlined. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.67.053614
DOI:
10.1103/PhysRevA.67.053614
PACS:
03.75.Kk
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