Crossover from Non-Equilibrium to Equilibrium Behavior in the Time-Dependent Kondo Model
Abstract
We investigate the equilibration of a Kondo model that is initially prepared in a non-equilibrium state towards its equilibrium behavior. Such initial non-equilibrium states can e.g. be realized in quantum dot experiments with time-dependent gate voltages. We evaluate the non-equilibrium spin-spin correlation function at the Toulouse point of the Kondo model exactly and analyze the crossover between non-equilibrium and equilibrium behavior as the non-equilibrium initial state evolves as a function of the waiting time for the first spin measurement. Using the flow equation method we extend these results to the experimentally relevant limit of small Kondo couplings.
Keywords
Cite
@article{arxiv.cond-mat/0405193,
title = {Crossover from Non-Equilibrium to Equilibrium Behavior in the Time-Dependent Kondo Model},
author = {D. Lobaskin and S. Kehrein},
journal= {arXiv preprint arXiv:cond-mat/0405193},
year = {2010}
}
Comments
4 pages, 2 figures; revised version contains added references and improved layout for figures