Measurement of coherent charge transfer in an adiabatic Cooper-pair pump

dc.contributorAalto Universityen
dc.contributor.authorFazio, Rosario
dc.contributor.authorHekking, F. W. J.
dc.contributor.authorPekola, Jukka P.
dc.contributor.departmentDepartment of Applied Physicsen
dc.contributor.departmentTeknillisen fysiikan laitosfi
dc.contributor.schoolPerustieteiden korkeakoulufi
dc.contributor.schoolSchool of Scienceen
dc.description.abstractWe study adiabatic charge transfer in a superconducting Cooper-pair pump, focusing on the influence of current measurement on coherence. We investigate the limit where the Josephson coupling energy EJ between the various parts of the system is small compared to the Coulomb charging energy EC. In this case, the charge transferred in a pumping cycle QP∼2e, the charge of one Cooper pair: The main contribution is due to incoherent Cooper-pair tunneling. We are particularly interested in the quantum correction to QP, which is due to coherent tunneling of pairs across the pump and which depends on the superconducting phase difference φ0 between the electrodes; 1−QP/(2e)∼(EJ/EC)cosφ0. A measurement of QP tends to destroy the phase coherence. We first study an arbitrary measuring circuit and then specific examples and show that coherent Cooper-pair transfer can, in principle, be detected using an inductively shunted ammeter.en
dc.description.versionPeer revieweden
dc.identifier.citationFazio, Rosario & Hekking, F. W. J. & Pekola, Jukka. 2003. Measurement of coherent charge transfer in an adiabatic Cooper-pair pump. Physical Review B. Volume 68, Issue 5. 054510/1-11. ISSN 1098-0121 (printed). DOI: 10.1103/physrevb.68.054510.en
dc.identifier.issn1098-0121 (printed)
dc.publisherAmerican Physical Society (APS)en
dc.relation.ispartofseriesPhysical Review Ben
dc.relation.ispartofseriesVolume 68, Issue 5
dc.rights© 2003 American Physical Society (APS).
dc.rights.holderAmerican Physical Society (APS)
dc.subject.keywordCooper-pair pumpsen
dc.subject.keywordcoherent charge transferen
dc.subject.keywordadiapatic charge transferen
dc.subject.keywordJosephson coupling energyen
dc.subject.keywordCoulomb charging energyen
dc.titleMeasurement of coherent charge transfer in an adiabatic Cooper-pair pumpen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionFinal published versionen
Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
318.99 KB
Adobe Portable Document Format