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

Grégory Strübi, Wolfgang Belzig, Mahn Soo Choi, C. Bruder

    Research output: Contribution to journalArticlepeer-review

    43 Citations (Scopus)

    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.

    Original languageEnglish
    Article number136403
    JournalPhysical review letters
    Volume107
    Issue number13
    DOIs
    Publication statusPublished - 2011 Sept 23

    ASJC Scopus subject areas

    • General Physics and Astronomy

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