Mesoscopic Fano effect in an Aharonov-Bohm interferometer Coulomb-coupled to a nearby quantum dot

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buir.contributor.orcidTanatar, Bilal|0000-0002-5246-0119
dc.citation.epage432en_US
dc.citation.issueNumber2en_US
dc.citation.spage430en_US
dc.citation.volumeNumber4en_US
dc.contributor.authorTolea, M.en_US
dc.contributor.authorMoldoveanu, V.en_US
dc.contributor.authorTanatar, Bilalen_US
dc.coverage.spatialOrlando, Florida, USAen_US
dc.date.accessioned2016-02-08T11:41:25Zen_US
dc.date.available2016-02-08T11:41:25Zen_US
dc.date.issued2007en_US
dc.departmentDepartment of Physicsen_US
dc.descriptionDate of Conference: 10-17 August 2005en_US
dc.descriptionConference Name: 24th International Conference on Low Temperature Physics, LT24 2005en_US
dc.description.abstractMotivated by the pionieering experiments of Buks et al. [Nature 391, 871 (1998)] we investigate the visibility of the Fano effect in a single-dot Aharonov-Bohm interferometer which is Coulomb-coupled to a nearby quantum dot. The latter acts as a 'Which Path Detector' and is coupled to two leads on which a finite bias is applied. Using the non-equilibrium Keldysh-Green function formalism we compute the currents through the detector and the interferometer. We take into account the first two contributions to the interaction selfenergy and emphasize the correction to the Landauer formula which appears beyond the single-particle approximation. Particular attention is given to the coherence properties of the interferometer in the presence of the electron-electron interaction between the embedded dot and the detector. We show that when the detector is subjected to a finite bias the amplitude of Aharonov-Bohm oscillations of the current through the interferometer decreases. The Fano line is in turn rather stable under interaction. Our results generalize an earlier work of Silva and Levit [Phys. Rev. B 63, 201309 (2001)] and complement the existing description of the controlled dephasing.en_US
dc.identifier.doi10.1002/pssc.200673304en_US
dc.identifier.issn1862-6351en_US
dc.identifier.urihttp://hdl.handle.net/11693/26992en_US
dc.language.isoEnglishen_US
dc.publisherWileyen_US
dc.relation.isversionofhttp://dx.doi.org/10.1002/pssc.200673304en_US
dc.source.titlePhysica Status Solidi (C): Current Topics in Solid State Physicsen_US
dc.subjectAharonov-Bohm interferometersen_US
dc.subjectCoherence propertiesen_US
dc.subjectElectron interactionsen_US
dc.subjectFano effectsen_US
dc.subjectFinite biasen_US
dc.subjectGreen functionsen_US
dc.subjectLandauer formulaeen_US
dc.subjectMesoscopicen_US
dc.subjectNano-devicesen_US
dc.subjectNon-equilibriumen_US
dc.subjectSingle particlesen_US
dc.subjectDetectorsen_US
dc.subjectFlow interactionsen_US
dc.subjectInterferometryen_US
dc.subjectNanostructuresen_US
dc.subjectOptical instrumentsen_US
dc.subjectOptical waveguidesen_US
dc.subjectQuantum electronicsen_US
dc.subjectSemiconductor quantum dotsen_US
dc.titleMesoscopic Fano effect in an Aharonov-Bohm interferometer Coulomb-coupled to a nearby quantum doten_US
dc.typeConference Paperen_US

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