Nonlinear Transport and Current Fluctuation in an AB Ring with a Quantum Dot

TL;DR

This paper investigates how nonlinear transport and current fluctuations in an Aharonov-Bohm ring with a quantum dot are affected by bias voltage, revealing the dependence of Fano line shapes and AB oscillations on nonequilibrium conditions.

Contribution

It provides explicit construction of nonequilibrium steady states for a noninteracting electron model in an AB ring with a quantum dot, highlighting the bias-dependent behavior of quantum interference effects.

Findings

Fano line shapes vary with bias voltage

AB oscillations are strongly bias-dependent

Current fluctuations are characterized in the nonequilibrium state

Abstract

Nonequilibrium steady states are explicitly constructed for a noninteracting electron model of an Aharonov-Bohm (AB) ring with a quantum dot (QD) with the aid of asymptotic fields. The Fano line shapes and AB oscillations are shown to strongly depend on the bias voltage. Current fluctuations are studied as well.