Measurement scheme of the Berry phase in superconducting circuits

dc.contributorAalto Universityen
dc.contributor.authorMöttönen, Mikko
dc.contributor.authorPekola, Jukka P.
dc.contributor.authorVartiainen, Juha J.
dc.contributor.authorBrosco, Valentina
dc.contributor.authorHekking, Frank W. J.
dc.contributor.departmentDepartment of Applied Physicsen
dc.contributor.departmentTeknillisen fysiikan laitosfi
dc.contributor.schoolPerustieteiden korkeakoulufi
dc.contributor.schoolSchool of Scienceen
dc.description.abstractWe present a measurement scheme for observing the Berry phase in a flux assisted Cooper pair pump—the Cooper pair sluice. In contrast to the recent experiments, in which the sluice was employed to generate accurate current through a resistance, we consider a device in a superconducting loop. This arrangement introduces a connection between the pumped current and the Berry phase accumulated during the adiabatic pumping cycles. From the adiabaticity criterion, we derive equations for the maximum pumped current and optimize the sluice accordingly. These results apply also to the high accuracy pumping which results in a potential candidate for a metrological current standard. For measuring the pumped current, an additional Josephson junction is installed into the superconducting loop. We show in detail that the switching of this system from superconducting state into normal state as a consequence of an external current pulse through it may be employed to probe the pumped current. To our knowledge the experimental realization of our scheme would be the first observation of the Berry phase in superconducting circuits.en
dc.description.versionPeer revieweden
dc.identifier.citationMöttönen, Mikko & Pekola, Jukka & Vartiainen, Juha J. & Brosco, Valentina & Hekking, Frank W. J. 2006. Measurement scheme of the Berry phase in superconducting circuits. Physical Review B. Volume 73, Issue 21. 214523/1-10. ISSN 1098-0121 (printed). DOI: 10.1103/physrevb.73.214523.en
dc.identifier.issn1098-0121 (printed)
dc.publisherAmerican Physical Society (APS)en
dc.relation.ispartofseriesPhysical Review Ben
dc.relation.ispartofseriesVolume 73, Issue 21
dc.rights© 2006 American Physical Society (APS).
dc.rights.holderAmerican Physical Society (APS)
dc.subject.keywordBerry phaseen
dc.subject.keywordJosephson devicesen
dc.subject.keywordCooper pair pumpingen
dc.titleMeasurement scheme of the Berry phase in superconducting circuitsen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionFinal published versionen
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