Derivation of a two-fluids model for a Bose gas from a quantum kinetic system
arXiv:0812.1721 · doi:10.3934/krm.2009.2.379
Abstract
We formally derive the hydrodynamic limit of a system modelling a bosons gas having a condensed part, made of a quantum kinetic and a Gross-Pitaevskii equation. The limit model, which is a two-fluids Euler system, is approximated by an isentropic system, which is then studied. We find in particular some conditions for the hyperbolicity, and we study the weak solutions. A numerical example is given at the end.
29 pages