Interference and parity blockade in transport through a Majorana box
(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.
(Less)
- author
- Nitsch, Maximilian LU ; Seoane Souto, Rubén LU and Leijnse, Martin LU
- organization
- publishing date
- 2022-11-15
- 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}}, }