title: Exact asymptotics of the current in boundary-driven dissipative quantum chains in large external fields.
abstract: A boundary-driven quantum master equation for a general inhomogeneous (nonintegrable) anisotropic Heisenberg spin-1/2 chain, or an equivalent nearest neighbor interacting spinless fermion chain, is considered in the presence of a strong external field f. We present an exact closed form expression for large f asymptotics of the current in the presence of a pure incoherent source and sink dissipation at the boundaries. In application, we demonstrate an arbitrary large current rectification in the presence of the interaction.
authors: J. Stefan Institute, SI-1000 Ljubljana, Slovenia.
authors: Zala
authors: Z
authors: Lenarčič
authors: Faculty of Mathematics and Physics, University of Ljubljana, SI-1000 Ljubljana, Slovenia.
authors: Tomaž
authors: T
authors: Prosen