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Vortex-enabled Andreev processes in quantum Hall-superconductor hybrids

Tang, Yuchen and Knapp, Christina and Alicea, Jason (2022) Vortex-enabled Andreev processes in quantum Hall-superconductor hybrids. . (Unpublished) https://resolver.caltech.edu/CaltechAUTHORS:20220816-192424755

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Abstract

Quantum Hall-superconductor heterostructures provide possible platforms for intrinsically fault-tolerant quantum computing. Motivated by several recent experiments that successfully integrated these phases, we investigate transport through a proximitized integer quantum Hall edge--paying particular attention to the impact of vortices in the superconductor. By examining the downstream conductance, we identify regimes in which sub-gap vortex levels mediate Andreev processes that would otherwise be frozen out in a vortex-free setup. Moreover, we show that at finite temperature, and in the limit of a large number of vortices, the downstream conductance can average to zero, indicating that the superconductor effectively behaves like a normal contact. Our results highlight the importance of considering vortices when using transport measurements to study superconducting correlations in quantum Hall-superconductor hybrids.


Item Type:Report or Paper (Discussion Paper)
Related URLs:
URLURL TypeDescription
http://arxiv.org/abs/2207.10687arXivDiscussion Paper
ORCID:
AuthorORCID
Knapp, Christina0000-0002-5982-8107
Alicea, Jason0000-0001-9979-3423
Additional Information:Attribution 4.0 International (CC BY 4.0). This work was supported by the Army Research Office under Grant Award W911NF-17-1-0323; the Caltech Institute for Quantum Information and Matter, an NSF Physics Frontiers Center with support of the Gordon and Betty Moore Foundation through Grant GBMF1250; and the Walter Burke Institute for Theoretical Physics at Caltech.
Group:Institute for Quantum Information and Matter, Walter Burke Institute for Theoretical Physics
Funders:
Funding AgencyGrant Number
Army Research Office (ARO)W911NF-17-1-0323
Institute for Quantum Information and Matter (IQIM)UNSPECIFIED
NSF Physics Frontiers CenterUNSPECIFIED
Gordon and Betty Moore FoundationGBMF1250
Walter Burke Institute for Theoretical Physics, CaltechUNSPECIFIED
Record Number:CaltechAUTHORS:20220816-192424755
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20220816-192424755
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:116315
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:16 Aug 2022 22:46
Last Modified:16 Aug 2022 22:46

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