Transport-based fusion that distinguishes between Majorana and Andreev bound states

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  • Maximilian Nitsch
  • Rubén Seoane Souto
  • Stephanie Matern
  • Martin Leijnse
It has proven difficult to distinguish between topological Majorana bound states and nontopological Andreev bound states and to measure the unique properties of the former. In this work, we aim to alleviate this problem by proposing and theoretically analyzing a different type of fusion protocol based on transport measurements in a Majorana box coupled to normal leads. The protocol is based on switching between different nanowire pairs being tunnel coupled to one of the leads. For a Majorana system, this leads to switching between different states associated with parity blockade. The charge being transmitted at each switch provides a measurement of the Majorana fusion rules. Importantly, the result is different for a system with nontopological Andreev bound states. The proposed protocol only requires measuring a DC current combined with fast gate control of the tunnel couplings.
OriginalsprogEngelsk
Artikelnummer165404
TidsskriftPhysical Review B
Vol/bind109
Udgave nummer16
Antal sider9
ISSN2469-9950
DOI
StatusUdgivet - 2024

Bibliografisk note

Funding Information:
We acknowledge stimulating discussions with Jens Schulenborg and Athanasios Tsintzis and funding from the European Research Council (ERC) under the European Unions Horizon 2020 research and innovation programme under Grant Agreement No. 856526, the Spanish CM “Talento Program” (Project No. 2022-T1/IND-24070), Spanish Ministry of Science, innovation, and Universities through Grant PID2022-140552NA-I00, the Swedish Research Council under Grant Agreement No. 2020-03412, and NanoLund.

Publisher Copyright:
© 2024 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by "https://www.kb.se/samverkan-och-utveckling/oppen-tillgang-och-bibsamkonsortiet/bibsamkonsortiet.html"Bibsam.

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