{"title":"Quantum Coulomb Drag Mediated by Cotunneling of Fluxons and Cooper Pairs.","authors":"Andrew G Semenov, Alex Latyshev, Andrei D Zaikin","doi":"10.1103/PhysRevLett.134.086001","DOIUrl":null,"url":null,"abstract":"<p><p>We predict two novel quantum drag effects which can occur in macroscopically quantum coherent Josephson circuits. We demonstrate that biasing one resistively shunted Josephson junction by an external current one can induce a nonzero voltage drop across another such junction capacitively coupled to the first one. This quantum Coulomb drag is caused by cotunneling of magnetic flux quanta across both junctions which remain in the \"superconducting\" regime. Likewise, Cooper pair cotunneling across a pair of connected in series Josephson junctions in the \"insulating\" regime is responsible for another-dual-quantum Coulomb drag effect.</p>","PeriodicalId":20069,"journal":{"name":"Physical review letters","volume":"134 8","pages":"086001"},"PeriodicalIF":9.0000,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physical review letters","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1103/PhysRevLett.134.086001","RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"PHYSICS, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
We predict two novel quantum drag effects which can occur in macroscopically quantum coherent Josephson circuits. We demonstrate that biasing one resistively shunted Josephson junction by an external current one can induce a nonzero voltage drop across another such junction capacitively coupled to the first one. This quantum Coulomb drag is caused by cotunneling of magnetic flux quanta across both junctions which remain in the "superconducting" regime. Likewise, Cooper pair cotunneling across a pair of connected in series Josephson junctions in the "insulating" regime is responsible for another-dual-quantum Coulomb drag effect.
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Physical review letters(PRL)covers the full range of applied, fundamental, and interdisciplinary physics research topics:
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