Thermalization of an impurity cloud in a Bose-Einstein condensate

Year: 2003

Authors: Montina A.

Autors Affiliation: Istituto Nazionale di Ottica Applicata, Largo Enrico Fermi 6, 50125 Firenze, Italy

Abstract: 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.

Journal/Review: PHYSICAL REVIEW A

Volume: 67 (5)      Pages from: 53614-1  to: 53614-5

KeyWords: Superfluidity; Scattering
DOI: 10.1103/PhysRevA.67.053614

Citations: 3
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