Europhys. Lett., 70 (5), pp. 642-648 (2005)
DOI: 10.1209/epl/i2004-10515-8

Study of a fluctuation-dissipation relation of a dissipative driven mesoscopic system

L. Arrachea¹ and L. F. Cugliandolo<sup>2, 3

1</sup>  Departamento de Física, Universidad de Buenos Aires Pab. I, Ciudad Universitaria 1428, Argentina
²  Laboratoire de Physique Théorique de l'Ecole Normale Supérieure 24 rue Lhomond, 75231 Paris Cedex 05, France
³  Laboratoire de Physique Théorique et Hautes Energies 4 place Jussieu, 75252 Paris Cedex 05, France

lili@df.uba.ar
leticia@lpt.ens.fr

received 13 October 2004; accepted in final form 8 April 2005
published online 27 April 2005

Abstract
We study the nonequilibrium dynamics of a mesoscopic metallic ring threaded by a time-dependent magnetic field and coupled to an electronic reservoir. We analyze the relation between the (nonstationary) real-time Keldysh and retarded Green functions and we argue that, in the linear-response regime with weak heat transfer to the environment, an effective temperature accounts for the modification of the equilibrium fluctuation-dissipation relation. We discuss possible extensions of this analysis.

PACS
72.10.-d - Theory of electronic transport; scattering mechanisms.
73.23.-b - Electronic transport in mesoscopic systems.

© EDP Sciences 2005