Quantum Phase Pumping

TL;DR

This paper investigates how adiabatic charge transport occurs in a normal mesoscopic sample connected to superconductors, driven by phase changes rather than potential modulation, with results influenced by temperature.

Contribution

It introduces a novel mechanism of quantum phase pumping driven by phase modulation in superconducting contacts without local potential changes.

Findings

Charge transfer depends on temperature and phase variation.

Transport mechanism is driven by quasiparticle deformation.

Charge transfer magnitude varies with phase and temperature.

Abstract

In this Letter, we consider the adiabatic charge transport through a normal mesoscopic sample sandwiched by superconductors without modulation of local chemical potentials. The deformation of coherent quasiparticles in the normal metal in the presence of periodically changing phases in the superconductors leads to a charge transport. Both the magnitude and the phase dependence of the charge transferred per period through the sample strongly depend on temperature.