Two-gas description of dilute Bose-Einstein condensates at finite temperature
R J Dodd; Mark Edwards; Charles W Clark
Журнал:
Journal of Physics B: Atomic, Molecular and Optical Physics
Дата:
1999-08-28
Аннотация:
We show that recent treatments of magnetically trapped Bose-Einstein condensates (BECs) at temperature T>0 fit a simple picture: the condensate wavefunction is that of a T = 0 BEC with the appropriate (depleted) number of condensate atoms N<sub>0</sub>, and the surrounding thermal cloud is described by the statistical mechanics of an ideal gas in the combined potentials of the magnetic trap and the cloud-condensate interaction. Even a simple classical description of the cloud reproduces its essential outline, and facilitates easy approximate calculations of BEC properties for T>0.
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