Properties of 1D two-barrier quantum pump with harmonically oscillating barriers

TL;DR

This paper investigates a one-dimensional quantum pump with two oscillating barriers, analyzing how various parameters influence the stationary current in both linear and non-linear regimes.

Contribution

It introduces a detailed analysis of a 1D quantum pump with harmonically oscillating barriers, considering multiple regimes and parameter dependencies.

Findings

Current direction depends on phase shift and frequency.

Stationary current varies with barrier separation and potential amplitudes.

Both linear and non-linear regimes exhibit distinct behaviors.

Abstract

We study a one-dimensional quantum pump composed of two oscillating delta-functional barriers. The linear and non-linear regimes are considered. The harmonic signal applied to any or both barriers causes the stationary current. The direction and value of the current depend on the frequency, distance between barriers, value of stationary and oscillating parts of barrier potential and the phase shift between alternating voltages.