Heat current in parametric quantum pump

TL;DR

This paper develops a general theory for heat flow in parametric quantum pumps using time-dependent scattering matrix theory, analyzing heat currents in a double barrier structure across different regimes.

Contribution

It introduces a comprehensive theoretical framework for pumped heat current at finite amplitudes and frequencies, applied to a double barrier system, highlighting optimal pumping conditions.

Findings

Double barrier structure can act as an optimal pump in strong pumping regimes.

Pumped heat current varies with system parameters and pumping strength.

The theory compares heat current with Joule heat, revealing efficiency conditions.

Abstract

We investigate the heat flow in the parametric quantum pump. Using the time dependent scattering matrix theory, we have developed a general theory for the pumped heat current at finite pumping amplitude and frequency. We have applied our theory to a double barrier structure and studied pumped heat current in both the weak and strong pumping regimes as different system parameters vary. By comparing the pumped heat current and the power of Joule heat generated in the system, we found that the double barrier structure can function as an optimal pump in the strong pumping regime.