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Quasiparticle poisoning in trivial and topological Josephson junctions

Svetogorov, Aleksandr E. and Loss, Daniel and Klinovaja, Jelena. (2022) Quasiparticle poisoning in trivial and topological Josephson junctions. Physical review B: Condensed matter and materials physics, 105 (17). p. 174519.

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Official URL: https://edoc.unibas.ch/92114/

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Abstract

We theoretically study a short single-channel Josephson junction between superconductors in the trivial and topological phases. The junction is assumed to be biased by a small current and subjected to quasiparticle poisoning. We find that the presence of quasiparticles leads to a voltage signal from the Josephson junction that can be observed both in the trivial and topological phases. Quite remarkably, these voltage signatures are sufficiently different in the two phases such that they can serve as means to clearly distinguish between trivial Andreev and topological Majorana bound states in the system. Moreover, these voltage signatures, in the trivial and topological phases, would allow one to directly measure the quasiparticle poisoning rates and test various approaches for protection against quasiparticle poisoning.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Theoretical Nano/Quantum Physics (Klinovaja)
UniBasel Contributors:Klinovaja, Jelena and Loss, Daniel
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Physical Society
ISSN:1098-0121
e-ISSN:1550-235X
Note:Publication type according to Uni Basel Research Database: Journal article
Language:English
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edoc DOI:
Last Modified:07 Feb 2023 04:10
Deposited On:02 Feb 2023 09:59

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