Bose Einstein condensation and superfluidity in an open system: theory

Details Bose Einstein condensation and superfluidity in an open system: theory Bose Einstein condensation and superfluidity in an open system: theory

2009-11-04

arxiv.org/abs/0911.0807v1

Physics

Condensed Matter

Quantum Gases

Scientific paper

We propose a new theoretical formalism which describes the Bose Einstein condensation of weakly interacting bosons with finite life time interacting with a thermal bath. We show that if a quasi-thermal distribution function of particles is achieved, the elementary excitations of the condensate show a linear spectrum characteristic of a superfluid, with a renormalized sound velocity with respect to the equilibrium case.

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