Number-conserving master equation theory for a dilute Bose-Einstein condensate

Details Number-conserving master equation theory for a dilute Bose-Einstein condensate Number-conserving master equation theory for a dilute Bose-Einstein condensate

2010-08-04

arxiv.org/abs/1008.0788v1

Phys. Rev. A 83, 013615 (2011)

Physics

Quantum Physics

Scientific paper

We describe the transition of $N$ weakly interacting atoms into a Bose-Einstein condensate within a number-conserving quantum master equation theory. Based on the separation of time scales for condensate formation and non-condensate thermalization, we derive a master equation for the condensate subsystem in the presence of the non-condensate environment under the inclusion of all two body interaction processes. We numerically monitor the condensate particle number distribution during condensate formation, and derive a condition under which the unique equilibrium steady state of a dilute, weakly interacting Bose-Einstein condensate is given by a Gibbs-Boltzmann thermal state of $N$ non-interacting atoms.

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