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Dynamics of mesoscopic systems: Non-equilibrium Green's functions approach
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SYSNO ASEP 0341565 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Dynamics of mesoscopic systems: Non-equilibrium Green's functions approach Author(s) Špička, Václav (FZU-D) RID, ORCID
Kalvová, Anděla (FZU-D) RID, ORCID
Velický, B. (CZ)Number of authors 3 Source Title Physica E: Low-Dimensional Systems and Nanostructures. - : Elsevier - ISSN 1386-9477
Roč. 42, č. 3 (2010), s. 525-538Number of pages 14 s. Language eng - English Country NL - Netherlands Keywords mesoscopic systems ; NGF ; initial condition ; correlations ; Ward identities ; transients Subject RIV BM - Solid Matter Physics ; Magnetism R&D Projects GA202/08/0361 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z10100520 - FZU-D (2005-2011) AV0Z10100521 - FZU-D (2005-2011) UT WOS 000274954500056 DOI 10.1016/j.physe.2009.08.008 Annotation Developments in technologies and experiments enable us to observe dynamical behavior of small quantum systems under conditions when it is sensitive to system parameters, internal interactions, the environment and the external time-dependent fields. This contribution deals with the status and perspectives of description of such non-equilibrium quantum many body systems using non-equilibrium Green's functions. This approach describe time development of the many-body system out of equilibrium from its initial state over its transient dynamics to its long time asymptotic evolution. The early stages of the transient evolution will be characterized for a broad class of the initial conditions generated in the course of Keldysh switch-on state. Gradual loss of initial correlations due to interactions and related renormalization processes in the system may, under favorable conditions, give rise to the evolution stage expressible in terms of non-equilibrium quasi-particles. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2011
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