Momentum-Space Josephson Effects

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dc.contributor.ISNI0000 0000 3722 2361 (Zhang, C)
dc.contributor.VIAF4042455 (Zhang, C)
dc.contributor.authorHou, Junpeng
dc.contributor.authorLuo, Xi-Wang
dc.contributor.authorSun, Kuei
dc.contributor.authorBersano, Thomas
dc.contributor.authorGokhroo, Vandna
dc.contributor.authorMossman, Sean
dc.contributor.authorEngels, Peter
dc.contributor.authorZhang, Chuanwei
dc.contributor.utdAuthorHou, Junpeng
dc.contributor.utdAuthorLuo, Xi-Wang
dc.contributor.utdAuthorSun, Kuei
dc.contributor.utdAuthorZhang, Chuanwei
dc.date.accessioned2019-05-03T19:59:18Z
dc.date.available2019-05-03T19:59:18Z
dc.date.created2018-03-23
dc.description.abstractThe Josephson effect is a prominent phenomenon of quantum supercurrents that has been widely studied in superconductors and superfluids. Typical Josephson junctions consist of two real-space superconductors (superfluids) coupled through a weak tunneling barrier. Here we propose a momentum-space Josephson junction in a spin-orbit coupled Bose-Einstein condensate, where states with two different momenta are coupled through Raman-assisted tunneling. We show that Josephson currents can be induced not only by applying the equivalent of "voltages," but also by tuning tunneling phases. Such tunneling-phase-driven Josephson junctions in momentum space are characterized through both full mean field analysis and a concise two-level model, demonstrating the important role of interactions between atoms. Our scheme provides a platform for experimentally realizing momentum-space Josephson junctions and exploring their applications in quantum-mechanical circuits.
dc.description.departmentSchool of Natural Sciences and Mathematics
dc.description.sponsorshipThis work was supported by Air Force Office of Scientific Research (FA9550-16-1-0387), National Science Foundation (PHY-1505496), and Army Research Office (W911NF-17-1-0128).
dc.identifier.bibliographicCitationHou, Junpeng, Xi-Wang Luo, Kuei Sun, Thomas Bersano, et al. 2018. "Momentum-space Josephson effects." Physical Review Letters 120(12): 120401:1-6, doi:10.1103/PhysRevLett.120.120401
dc.identifier.issn0031-9007
dc.identifier.issue12
dc.identifier.urihttps://hdl.handle.net/10735.1/6445
dc.identifier.volume120
dc.language.isoen
dc.publisherAmer Physical Soc
dc.relation.urihttp://dx.doi.org/10.1103/PhysRevLett.120.120401
dc.rights©2018 American Physical Society
dc.source.journalPhysical Review Letters
dc.subjectBose-einstein condensation
dc.subjectSuperfluidity
dc.subjectOscillations
dc.subjectGases
dc.subjectPhysics
dc.subjectJosephson effect
dc.titleMomentum-Space Josephson Effects
dc.type.genrearticle

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