Interference in transport through double barriers in interacting quantum wires

TL;DR

This paper studies how quantum interference affects backscattering current in a double-barrier quantum wire system, revealing how interaction strength and barrier placement influence oscillation and scaling behaviors.

Contribution

It provides new insights into the interference effects and voltage scaling of backscattering currents in interacting quantum wires with double barriers.

Findings

Backscattering current oscillates due to quantum interference.

Interaction strength alters the scaling behavior.

Barrier placement influences oscillation characteristics.

Abstract

We investigate interference effects of the backscattering current through a double-barrier structure in an interacting quantum wire attached to noninteracting leads. Depending on the interaction strength and the location of the barriers, the backscattering current exhibits different oscillation and scaling characteristics with the applied voltage in the strong and weak interaction cases. However, in both cases, the oscillation behaviors of the backscattering current are mainly determined by the quantum mechanical interference due to the existence of the double barriers.