Low energy anomalies in electron tunneling through strongly asymmetric Majorana nanowire

TL;DR

This paper investigates electron tunneling in asymmetric Majorana nanowires, revealing how biasing and geometry influence zero-bias anomalies and current behavior, with implications for quantum transport in topological systems.

Contribution

It demonstrates that unbiased electrodes restore zero-bias anomalies in asymmetric Majorana nanowires and highlights the qualitative differences in current between Majorana and resonant levels.

Findings

Unbiased electrodes restore zero-bias anomaly despite Majorana splitting.

Current behavior in asymmetric Majorana junction differs from resonant levels.

Geometry significantly affects electron transport in Majorana nanowires.

Abstract

Electron transport through Majorana nanowire with strongly asymmetric couplings to normal metal leads is considered. In three terminal geometry (electrically grounded nanowire) it is shown that the presence of unbiased electrode restores zero-bias anomaly even for strong Majorana energy splitting. For effectively two-terminal geometry we show that electrical current through asymmetric Majorana junction is qualitatively different from the analogous current through a resonant (Breit-Wigner) level.