Statistical Majorana Bound State Spectroscopy

Tunnel spectroscopy data for the detection of Majorana bound states (MBS) is often criticized for its proneness to misinterpretation of genuine MBS with low-lying Andreev bound states. Here, we suggest a protocol removing this ambiguity by extending single shot measurements to sequences performed at varying system parameters. We demonstrate how such sampling, which we argue requires only moderate effort for current experimental platforms, resolves the statistics of Andreev side lobes, thus providing compelling evidence for the presence or absence of a Majorana center peak.

Automated summary

Tunnel spectroscopy data for Majorana bound states (MBS) detection is often criticized for potential confusion with low-lying Andreev bound states. We propose a protocol using sequence measurements at varying system parameters to remove this ambiguity. Our sampling method resolves the statistics of Andreev side lobes, providing compelling evidence for the presence or absence of a Majorana center peak.