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

Nitsch, Maximilian LU orcid ; Seoane Souto, Rubén LU orcid ; Matern, Stephanie LU and Leijnse, Martin LU (2024) In Physical Review B 109(16).
Abstract

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... (More)

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.

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Please use this url to cite or link to this publication:
author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review B
volume
109
issue
16
article number
165404
publisher
American Physical Society
external identifiers
  • scopus:85189323017
ISSN
2469-9950
DOI
10.1103/PhysRevB.109.165404
language
English
LU publication?
yes
id
dd616a7b-1562-4b30-b9e4-9a74a512e623
date added to LUP
2024-04-23 14:38:14
date last changed
2024-04-23 14:39:08
@article{dd616a7b-1562-4b30-b9e4-9a74a512e623,
  abstract     = {{<p>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.</p>}},
  author       = {{Nitsch, Maximilian and Seoane Souto, Rubén and Matern, Stephanie and Leijnse, Martin}},
  issn         = {{2469-9950}},
  language     = {{eng}},
  month        = {{04}},
  number       = {{16}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review B}},
  title        = {{Transport-based fusion that distinguishes between Majorana and Andreev bound states}},
  url          = {{http://dx.doi.org/10.1103/PhysRevB.109.165404}},
  doi          = {{10.1103/PhysRevB.109.165404}},
  volume       = {{109}},
  year         = {{2024}},
}