Defining the effective temperature of a quantum driven system from current-current correlation functions
Mesoscale and Nanoscale Physics
2012-08-02 v3
Abstract
We calculate current-current correlation functions and find an expression for the zero-frequency noise of multiterminal systems driven by harmonically time-dependent voltages within the Keldysh non-equilibrium Green's functions formalism. We also propose a fluctuation-dissipation relation for current-current correlation functions to define an effective temperature. We discuss the behavior of this temperature and compare it with the local temperature determined by a thermometer and with the effective temperature defined from a single-particle fluctuation-dissipation relation. We show that for low frequencies all the definitions of the temperature coincide.
Cite
@article{arxiv.1111.1988,
title = {Defining the effective temperature of a quantum driven system from current-current correlation functions},
author = {Alvaro Caso and Liliana Arrachea and Gustavo S. Lozano},
journal= {arXiv preprint arXiv:1111.1988},
year = {2012}
}
Comments
11 pages, 5 figures