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 (Unpublished) https://resolver.caltech.edu/CaltechAUTHORS:20220816-192424755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) | ||||||||||||
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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 | ||||||||||||
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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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