Regensburg 2013 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 40: Poster Session Correlated Electrons

TT 40.71: Poster

Wednesday, March 13, 2013, 15:00–19:00, Poster D

Quasiparticle parameterization of meanfields, Galilean invariance and universal conserving response function — •Klaus Morawetz — Münster University of Applied Sciences, Stegerwaldstrasse 39, 48565 Steinfurt, Germany — International Institute of Physics (IIP), Av. Odilon Gomes de Lima 1722, 59078-400 Natal, Brazil — Max-Planck-Institute for the Physics of Complex Systems, 01187 Dresden, Germany

The form of meanfield and density functional parameterization in terms of current, energy and density are examined by the restriction of Galilean invariance. It is found that besides a density functional only one parameter remains which is usually condensed in the effective mass. The universal response with respect to density, momentum and energy is found in the sense that the response becomes independent on actual parameterization of the local equilibrium provided the conservation laws are enforced. The sum rules by frequency moments and the compressibility sum rule impose further restrictions which determines the last parameter.