Transport equations including many-particle correlations for an arbitrary quantum system. General formalism

Дата и время публикации : 1996-10-16T09:50:19Z

Авторы публикации и институты :
J. Fricke

Ссылка на журнал-издание: Ann. Phys. (N.Y.) 252 (1996) 479
Коментарии к cтатье: 19 pages, 14 Postscript figures, uses RevTeX, to be published in: Annals of Physics (N.Y.)
Первичная категория: cond-mat.stat-mech

Все категории : cond-mat.stat-mech

Краткий обзор статьи: We present a new method to derive transport equations for quantum many-particle systems. This method uses an equation-of-motion technique and is applicable to systems with bosons and fermions, arbitrary interactions and time-dependent external fields. Using a cluster expansion of the r-particle density matrices the infinite hierarchy of equations of motion for many-particle expectation values is transposed into an equivalent one in terms of correlations. This new hierarchy permits a systematic breaking of the hierarchy at any order. Diagrams are derived for these transport equations. In a second paper the method is tested for exactly soluble electron-phonon models in one dimension.

Category: Physics