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DY: Dynamik und Statistische Physik

DY 42: Statistische Physik fernab vom Gleichgewicht I

DY 42.1: Vortrag

Donnerstag, 14. März 2002, 11:15–11:30, H2

Space-time versus particle-hole symmetry in quantum Enskog equations — •Klaus Morawetz¹, Václav Špička², and Pavel Lipavský² — ¹Max-Planck-Institute for the Physics of Complex Systems, Noethnitzer Str. 38, 01187 Dresden, Germany — ²Institute of Physics, Academy of Sciences, Cukrovarnická 10, 16200 Praha 6, Czech Republic

The non-local scattering-in and -out integrals of the Enskog equation have reversed displacements of colliding particles reflecting that the -in and -out processes are conjugated by the space and time inversions. Generalisations of the Enskog equation to Fermi liquid systems are hindered by a request of the particle-hole symmetry which contradicts the reversed displacements. We resolve this problem with the help of the optical theorem. It is found that space-time and particle-hole symmetry can only be fulfilled simultaneously for the Bruckner-type of internal Pauli-blocking while the Feynman-Galitskii form allows only for particle-hole symmetry but not for space-time symmetry due to stimulated emission of Bosons.