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Relaxation of a quantum many‐body system from a correlated initial state. A general and consistent approach
Author(s) -
Semkat D.,
Bonitz M.,
Kremp D.
Publication year - 2003
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.200310037
Subject(s) - bbgky hierarchy , relaxation (psychology) , statistical physics , non equilibrium thermodynamics , quantum , hierarchy , physics , quantum mechanics , distribution function , psychology , social psychology , economics , market economy
Abstract Various approaches to a theoretical treatment of the dynamics of quantum many‐body systems starting from a correlated initial state are discussed. In particular, we compare the concept of the BBGKY–hierarchy (singletime reduced density operators) and that of nonequilibrium Green's functions (two‐time correlation functions). Conditions for physically meaningful initial correlations are established. (© 2003 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)