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Interference and parity blockade in transport through a Majorana box

Nitsch, Maximilian LU orcid ; Seoane Souto, Rubén LU orcid and Leijnse, Martin LU (2022) In Physical Review B 106(20).
Abstract

A Majorana box - two topological superconducting nanowires coupled via a trivial superconductor - is a building block in devices aiming to demonstrate non-Abelian physics, as well as for topological quantum computer architectures. We theoretically investigate charge transport through a Majorana box and show that current can be blocked when two Majoranas couple to the same lead, fixing their parity. In direct analogy to a Pauli spin blockade in spin qubits, this parity blockade can be used for fast and high-fidelity qubit initialization and readout, as well as for current-based measurements of decoherence times. Furthermore, we demonstrate that transport can distinguish between a clean Majorana box and a disordered box with additional... (More)

A Majorana box - two topological superconducting nanowires coupled via a trivial superconductor - is a building block in devices aiming to demonstrate non-Abelian physics, as well as for topological quantum computer architectures. We theoretically investigate charge transport through a Majorana box and show that current can be blocked when two Majoranas couple to the same lead, fixing their parity. In direct analogy to a Pauli spin blockade in spin qubits, this parity blockade can be used for fast and high-fidelity qubit initialization and readout, as well as for current-based measurements of decoherence times. Furthermore, we demonstrate that transport can distinguish between a clean Majorana box and a disordered box with additional unwanted Majorana or Andreev bound states.

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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
106
issue
20
article number
L201305
publisher
American Physical Society
external identifiers
  • scopus:85142771437
ISSN
2469-9950
DOI
10.1103/PhysRevB.106.L201305
language
English
LU publication?
yes
id
11fb6e5d-d3c4-481a-aa31-96fd89781e00
date added to LUP
2022-12-23 11:02:47
date last changed
2023-11-19 13:16:34
@article{11fb6e5d-d3c4-481a-aa31-96fd89781e00,
  abstract     = {{<p>A Majorana box - two topological superconducting nanowires coupled via a trivial superconductor - is a building block in devices aiming to demonstrate non-Abelian physics, as well as for topological quantum computer architectures. We theoretically investigate charge transport through a Majorana box and show that current can be blocked when two Majoranas couple to the same lead, fixing their parity. In direct analogy to a Pauli spin blockade in spin qubits, this parity blockade can be used for fast and high-fidelity qubit initialization and readout, as well as for current-based measurements of decoherence times. Furthermore, we demonstrate that transport can distinguish between a clean Majorana box and a disordered box with additional unwanted Majorana or Andreev bound states.</p>}},
  author       = {{Nitsch, Maximilian and Seoane Souto, Rubén and Leijnse, Martin}},
  issn         = {{2469-9950}},
  language     = {{eng}},
  month        = {{11}},
  number       = {{20}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review B}},
  title        = {{Interference and parity blockade in transport through a Majorana box}},
  url          = {{http://dx.doi.org/10.1103/PhysRevB.106.L201305}},
  doi          = {{10.1103/PhysRevB.106.L201305}},
  volume       = {{106}},
  year         = {{2022}},
}