Instantons in the out-of-equilibrium Coulomb blockade
Mesoscale and Nanoscale Physics
2021-10-27 v1 Strongly Correlated Electrons
High Energy Physics - Theory
Abstract
Physical properties of single-electron devices in the week Coulomb blockade regime are significantly dependent on non-perturbative effects. They arise as instanton solutions of equations of motion for the corresponding Ambegaokar-Eckern-Schoen action. In equilibrium those solutions are known as Korshunov instantons. In this paper we study non-equilibrium Ambegaokar-Eckern- Schoen action using Keldysh technique. We found instantons for the most general stationary out-of equilibrium state. We also found that action saddle-point value assumes a universal value irrespective of the stationary non-equilibrium state.
Keywords
Cite
@article{arxiv.2012.04390,
title = {Instantons in the out-of-equilibrium Coulomb blockade},
author = {A. S. Dotdaev and Ya. I. Rodionov and K. S. Tikhonov},
journal= {arXiv preprint arXiv:2012.04390},
year = {2021}
}