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Interferometric and noise signatures of Majorana fermion edge states in transport experiments

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Author Strübi G, Belzig W, Choi M-S, Bruder C,
Project Quantum coherence, quantum statistics, and superconductivity in mesoscopic systems
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Original article (peer-reviewed)

Journal Physical Review Letters
Volume (Issue) 107(13)
Page(s) 136403 - 136403
Title of proceedings Physical Review Letters

Abstract

Domain walls between superconducting and magnetic regions placed on top of a topological insulator support transport channels for Majorana fermions. We propose to study noise correlations in a Hanbury Brown-Twiss type interferometer and find three signatures of the Majorana nature of the channels. First, the average charge current in the outgoing leads vanishes. Furthermore, we predict an anomalously large shot noise in the output ports for a vanishing average current signal. Adding a quantum point contact to the setup, we find a surprising absence of partition noise which can be traced back to the Majorana nature of the carriers.
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