Transport-based fusion that distinguishes between Majorana and Andreev bound states
(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.
(Less)
- author
- Nitsch, Maximilian
LU
; Seoane Souto, Rubén LU
; Matern, Stephanie LU and Leijnse, Martin LU
- organization
- publishing date
- 2024-04-15
- 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}}, }