Multiplet Supercurrents in a Josephson Circuit

Multiterminal Josephson circuits have been proposed as a promising platform to host synthetic topological phases of matter, Floquet states, and multiplet supercurrents that are mediated by pairs of Cooper pairs. Here, we explore a Josephson circuit in which three superconducting electrodes are connected through Josephson junctions to a common superconducting island. We demonstrate the dynamic generation of the multiplet supercurrents, which are found to be robust to elevated temperatures and are confirmed by exhibiting the expected Shapiro step quantization under a microwave drive. We also find an unexpected novel supercurrent, which couples a pair of contacts that are both voltage-biased with respect to the common superconducting island. We show that this supercurrent also results from synchronization of the phase dynamics of the device, opening pathways to study the interplay of nonlinear, quantum, and topological physics.

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Publication Details

Journal
Physical Review Letters
Published
2025-02-10
DOI
https://doi.org/10.1103/physrevlett.134.067001
Citations
2
Primary Topic
Quantum and electron transport phenomena
Type
article
Field-Weighted Citation Impact
2.49

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article

Multiplet Supercurrents in a Josephson Circuit

John Chiles, Ethan G. Arnault, Gleb Finkelstein, François Amet et al.
2 citations
Physical Review Letters
Quantum and electron transport phenomena
2.49
article

Multiplet Supercurrents in a Josephson Circuit

John Chiles, Ethan G. Arnault, Gleb Finkelstein, François Amet, Takashi Taniguchi, Kenji Watanabe, Trevyn F. Q. Larson, Chun-Chia Chen, Lingfei Zhao
article en
2 citations

Abstract

Multiterminal Josephson circuits have been proposed as a promising platform to host synthetic topological phases of matter, Floquet states, and multiplet supercurrents that are mediated by pairs of Cooper pairs. Here, we explore a Josephson circuit in which three superconducting electrodes are connected through Josephson junctions to a common superconducting island. We demonstrate the dynamic generation of the multiplet supercurrents, which are found to be robust to elevated temperatures and are confirmed by exhibiting the expected Shapiro step quantization under a microwave drive. We also find an unexpected novel supercurrent, which couples a pair of contacts that are both voltage-biased with respect to the common superconducting island. We show that this supercurrent also results from synchronization of the phase dynamics of the device, opening pathways to study the interplay of nonlinear, quantum, and topological physics.

Physical Review LettersVol. 134(6)
Duke University (US), Appalachian State University (US)
National Science Foundation, U.S. Department of Energy, Duke University, Ministry of Education, Culture, Sports, Science and Technology, Japan Society for the Promotion of Science, Basic Energy Sciences, Division of Materials Sciences and Engineering
Openalex Percentile: Top 14%
Quantum and electron transport phenomena
2.49
DOIOpen Access PDFOpenAlex
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Multiplet Supercurrents in a Josephson Circuit — John Chiles, Ethan G. Arnault, et al. · Physical Review Letters (2025) | TGRS Research Map | TGRS