Decoherence in elastic and polaronic transport via discrete quantum states

TL;DR

This paper investigates how decoherence affects elastic and polaronic transport through discrete quantum states, using a nonperturbative Green's function approach to analyze current and noise under various conditions.

Contribution

It introduces a nonperturbative computational scheme based on Green's function theory and polaron transformation to study decoherence effects in quantum transport.

Findings

Decoherence significantly alters current and shot noise profiles.

Dephasing and relaxation processes impact transport characteristics.

The method accurately captures many-body electron-phonon interactions.

Abstract

Here we study the effect of decoherence on elastic and polaronic transport via discrete quantum states. The calculations are performed with the help of nonperturbative computational scheme, based on the Green's function theory within the framework of polaron transformation (GFT-PT), where the many-body electron-phonon interaction problem is mapped exactly into a single-electron multi-channel scattering problem. In particular, the influence of dephasing and relaxation processes on the shape of the electrical current and shot noise curves is discussed in detail under the linear and nonlinear transport conditions.