Coulomb Interaction and Quantum Transport through a Coherent Scatterer

Abstract

An interplay between charge discreteness, coherent scattering and Coulomb interaction yields nontrivial effects in quantum transport. We derive a real time effective action and an equivalent quantum Langevin equation for an arbitrary coherent scatterer and evaluate its current-voltage characteristics in the presence of interactions. Within our model, at large conductances $G_0$ and low $T$ (but outside the instanton-dominated regime) the interaction correction to $G_0$ saturates and causes conductance suppression by a universal factor which depends only on the type of the conductor.

4 pages, no figures

References in corpus (1)

• Non-equilibrium electronic transport and interaction in short metallic nanobridges

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