Kinetic transport theory with quantum coherence

Details Kinetic transport theory with quantum coherence Kinetic transport theory with quantum coherence

2008-11-06

arxiv.org/abs/0811.0936v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages. To appear in the proceedings of the 8th Conference on Strong and Electroweak Matter (SEWM08), Amsterdam, the Netherla

Scientific paper

10.1016/j.nuclphysa.2009.01.050

We derive transport equations for fermions and bosons in spatially or temporally varying backgrounds with special symmetries, by use of the Schwinger-Keldysh formalism. In a noninteracting theory the coherence information is shown to be encoded in new singular shells for the 2-point function. Imposing this phase space structure to the interacting theory leads to a a self-consistent equation of motion for a physcial density matrix, including coherence and a well defined collision integral. The method is applied e.g. to demonstrate how an initially coherent out-of-equlibrium state approaches equlibrium through decoherence and thermalization.

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