Počet záznamů: 1

Dynamics of mesoscopic systems: Non-equilibrium Green's functions approach

  1. 1.
    0341565 - FZU-D 2011 RIV NL eng J - Článek v odborném periodiku
    Špička, Václav - Kalvová, Anděla - Velický, B.
    Dynamics of mesoscopic systems: Non-equilibrium Green's functions approach.
    Physica E: Low-Dimensional Systems and Nanostructures. Roč. 42, č. 3 (2010), s. 525-538 ISSN 1386-9477
    Grant CEP: GA ČR GA202/08/0361
    Výzkumný záměr: CEZ:AV0Z10100520; CEZ:AV0Z10100521
    Klíčová slova: mesoscopic systems * NGF * initial condition * correlations * Ward identities * transients
    Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
    Impakt faktor: 1.304, rok: 2010

    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.
    Trvalý link: http://hdl.handle.net/11104/0184505