The Wigner-Poisson-Fokker-Planck system: global-in-time solution and dispersive estimates

Details The Wigner-Poisson-Fokker-Planck system: global-in-time solution and dispersive estimates The Wigner-Poisson-Fokker-Planck system: global-in-time solution and dispersive estimates

2005-05-18

arxiv.org/abs/math/0505385v1

Mathematics

Analysis of PDEs

Scientific paper

This paper is concerned with the Wigner-Poisson-Fokker-Planck system, a kinetic evolution equation for an open quantum system with a non-linear Hartree potential. Existence, uniqueness and regularity of global solutions to the Cauchy problem in 3 dimensions are established. The analysis is carried out in a weighted L^2-space, such that the linear quantum Fokker-Planck operator generates a dissipative semigroup.The non-linear potential can be controled by using the parabolic regularization of the system. The main technical difficulty for establishing global-in-time solutions is to derive a-priori estimates on the electric field:Inspired by a strategy for the classical Vlasov-Fokker-Planck equation, we exploit dispersive effects of the free transport operator. As a ``by-product'' we also derive a new a-priori estimate on the field in the Wigner-Poisson equation.

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