Stationary quantum BGK model for bosons and fermions in a bounded interval

Abstract

In this paper, we consider the existence problem for a stationary relaxational models of the quantum Boltzmann equation. More precisely, we establish the existence of mild solution to the fermionic or bosonic quantum BGK model in a slab with inflow boundary data. Unlike the classical case, it is necessary to verify that the quantum local equilibrium state is well-defined, and the transition from the non-condensed state to the condensated state (Bosons), or from the non-saturated state to the saturated state (Fermions) does not arise in our solution space.

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• Stationary solutions to the Boltzmann equation in the Hydrodynamic limit
• A quantum relaxation-time approximation for finite fermion systems
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• Existence and conservation laws for the Boltzmann-Fermi equation in a general domain