Correlated initial condition for an embedded process by time partitioning

0347554 - FZÚ 2011 RIV US eng J - Journal Article
Velický, Bedřich - Kalvová, Anděla - Špička, Václav
Correlated initial condition for an embedded process by time partitioning.
Physical Review. B. Roč. 81, č. 23 (2010), 235116/1-235116/12. ISSN 1098-0121
R&D Projects: GA ČR GA202/08/0361
Institutional research plan: CEZ:AV0Z10100520; CEZ:AV0Z10100521
Keywords : non-equilibrium * Initial conditions * decay of correlations * Green's functions * quantum transport equations
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 3.772, year: 2010

tudy of transients in the electron quantum transport by Non-Equilibrium Green's Functions (NGF) often requires an explicit inclusion of correlations at a finite initial time. For processes embedded in a host process, a universal treatment of the correlated initial conditions based on the formalism of partitioning in time allows to express their self-energy including the "irregular" correlation part in terms of the known properties of the host process. This unified formalism also yields the renormalized semi-group property for propagators and the reconstruction equations for the particle correlation function. The Bogolyubov principle of the decay of correlations then permits to build up a theory of quantum transport equations with finite time initial conditions.
Permanent Link: http://hdl.handle.net/11104/0188310