caa a22 4500 467892210 CHVBK 20180406152752.0 cr unu---uuuuu 170328e20060401xx s 000 0 eng 10.1007/s10955-006-9055-5 doi (NATIONALLICENCE)springer-10.1007/s10955-006-9055-5 Violation of the Fluctuation-Dissipation Theorem and Heating Effects in the Time-Dependent Kondo Model [Elektronische Daten] [Dmitry Lobaskin, Stefan Kehrein] The fluctuation-dissipation theorem (FDT) plays a fundamental role in understanding quantum many-body problems. However, its applicability is limited to equilibrium systems and it does in general not hold in nonequilibrium situations. This violation of the FDT is an important tool for studying nonequilibrium physics. In this paper we present results for the violation of the FDT in the Kondo model where the impurity spin is frozen for all negative times, and set free to relax at positive times. We derive exact analytical results at the Toulouse point, and results within a controlled approximation in the Kondo limit, which allow us to study the FDT violation on all time scales. A measure of the FDT violation is provided by the effective temperature, which shows initial heating effects after switching on the perturbation, and then exponential cooling to zero temperature as the Kondo system reaches equilibrium. Springer Science+Business Media, Inc., 2006 Fluctuation-dissipation theorem nationallicence Strongly-correlated electrons nationallicence Kondo problem nationallicence Non-equilibrium many-body systems nationallicence Lobaskin Dmitry Theoretische Physik III - Elektronische Korrelationen und Magnetismus, Universität Augsburg, 86135, Augsburg, Germany aut Kehrein Stefan Theoretische Physik III - Elektronische Korrelationen und Magnetismus, Universität Augsburg, 86135, Augsburg, Germany aut Journal of Statistical Physics Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 123/2(2006-04-01), 301-313 0022-4715 123:2<301 2006 123 10955 https://doi.org/10.1007/s10955-006-9055-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10955-006-9055-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lobaskin Dmitry Theoretische Physik III - Elektronische Korrelationen und Magnetismus, Universität Augsburg, 86135, Augsburg, Germany aut NATIONALLICENCE 700 1- Kehrein Stefan Theoretische Physik III - Elektronische Korrelationen und Magnetismus, Universität Augsburg, 86135, Augsburg, Germany aut NATIONALLICENCE 773 0- Journal of Statistical Physics Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 123/2(2006-04-01), 301-313 0022-4715 123:2<301 2006 123 10955 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer