1210.4926 (Camille Aron et al.)

Impurity model for non-equilibrium steady states    [PDF]

Camille Aron, Cedric Weber, Gabriel Kotliar

We propose an out-of-equilibrium impurity model for the dynamical mean-field description of the Hubbard model driven by a finite electric field. The out-of-equilibrium impurity environment is decomposed into a collection of equilibrium reservoirs at different chemical potentials. We discuss the validity of the impurity model and propose a non perturbative method, based on a quantum Monte Carlo solver, which provides the steady-state solutions of the impurity and original lattice problems. We discuss the relevance of this approach for other non-equilibrium steady-state contexts.

View original: http://arxiv.org/abs/1210.4926