Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2004-06-02
Phys. Rev. A 71, 053604 (2005)
Physics
Condensed Matter
Statistical Mechanics
RevTeX, 14 pages, 3 figures; results for the harmonic trap added; corrected references
Scientific paper
10.1103/PhysRevA.71.053604
We study fluctuations of the number of Bose condensed atoms in weakly interacting homogeneous and trapped gases. For a homogeneous system we apply the particle-number-conserving formulation of the Bogoliubov theory and calculate the condensate fluctuations within the canonical and the microcanonical ensembles. We demonstrate that, at least in the low-temperature regime, predictions of the particle-number-conserving and traditional, nonconserving theory are identical, and lead to the anomalous scaling of fluctuations. Furthermore, the microcanonical fluctuations differ from the canonical ones by a quantity which scales normally in the number of particles, thus predictions of both ensembles are equivalent in the thermodynamic limit. We observe a similar behavior for a weakly interacting gas in a harmonic trap. This is in contrast to the trapped, ideal gas, where microcanonical and canonical fluctuations are different in the thermodynamic limit.
No associations
LandOfFree
Microcanonical fluctuations of the condensate in weakly interacting Bose gases does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Microcanonical fluctuations of the condensate in weakly interacting Bose gases, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microcanonical fluctuations of the condensate in weakly interacting Bose gases will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-348502