Adiabatic quantum pumping of chiral Majorana fermions

TL;DR

This paper explores how adiabatic quantum pumping can be used to detect and manipulate chiral Majorana fermions in interferometer systems, revealing their unique transport signatures.

Contribution

It introduces a novel interferometer setup for adiabatic quantum pumping of chiral Majorana states and analyzes their distinctive current signatures.

Findings

Pumped current exhibits signatures of chiral Majorana states.

Tuning coupling allows finite pumped current with zero conductance.

Scattering matrix formalism effectively describes the system.

Abstract

We investigate adiabatic quantum pumping of chiral Majorana states in a system composed of two Mach--Zehnder type interferometers coupled via a quantum point contact. The pumped current is generated by periodic modulation of the phases accumulated by traveling around each interferometer. Using scattering matrix formalism we show that the pumped current reveals a definite signature of the chiral nature of the Majorana states involved in transport in this geometry. Furthermore, by tuning the coupling between the two interferometers the pump can operate in a regime where finite pumped current and zero two-terminal conductance is expected.