Kinetic-Theoretic Description based on Closed-Time-Path Formalism

Details Kinetic-Theoretic Description based on Closed-Time-Path Formalism Kinetic-Theoretic Description based on Closed-Time-Path Formalism

2001-04-12

arxiv.org/abs/cond-mat/0104220v1

Physics

Condensed Matter

Statistical Mechanics

11 pages, 20 figures

Scientific paper

Utilizing a non-equilibrium Green function like the generalized Kadanoff-Baym ansatz, a systematic perturbative method is presented to calculate the expectation value of an arbitrary physical quantity under the restriction that the Wigner distribution function is fixed. It is shown that, in the diagrammatic expression of the quantity, a certain part of contributions can be eliminated due to the restriction. Together with the quantum kinetic equation, this method provides a basis for the kinetic-theoretical description.

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