Spontaneous and persistent currents in mesoscopic Aharonov-Bohm loops: Static properties and coherent dynamic behavior in crossed electric and magnetic fields

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dc.citation.epage1008en_US
dc.citation.issueNumber6en_US
dc.citation.spage999en_US
dc.citation.volumeNumber101en_US
dc.contributor.authorKulik, I. O.en_US
dc.date.accessioned2016-02-08T10:21:13Z
dc.date.available2016-02-08T10:21:13Z
dc.date.issued2005en_US
dc.departmentDepartment of Physicsen_US
dc.description.abstractMesoscopic or macromolecular conducting rings with a fixed number of electrons are shown to support persistent currents due to the Aharonov-Bohm flux, and the "spontaneous" persistent currents without the flux when structural transformation in the ring is blocked by strong coupling to the externally azimuthal-symmetric environment. In the free-standing macromolecular ring, symmetry breaking removes the azimuthal periodicity, which is further restored at the increasing field, however. The dynamics of the Aharonov-Bohm loop in crossed electric and magnetic fields is investigated within the tight-binding approximation; we show that transitions between discrete quantum states occur when static voltage pulses of prescribed duration are applied to the loop. In particular, the three-site ring with one or three electrons is an interesting quantum system that can serve as a qubit (quantum bit of information) and a qugate (quantum logical gate) because in the presence of an externally applied static electric field perpendicular to a magnetic field, the macromolecular ring switches between degenerate ground states mimicking the NOT and Hadamard gates of quantum computers.en_US
dc.description.provenanceMade available in DSpace on 2016-02-08T10:21:13Z (GMT). No. of bitstreams: 1 bilkent-research-paper.pdf: 70227 bytes, checksum: 26e812c6f5156f83f0e77b261a471b5a (MD5) Previous issue date: 2005en
dc.identifier.doi10.1134/1.2163917en_US
dc.identifier.eissn1090-6509
dc.identifier.issn1063-7761
dc.identifier.urihttp://hdl.handle.net/11693/23918
dc.language.isoEnglishen_US
dc.publisherM A I K Nauka - Interperiodicaen_US
dc.relation.isversionofhttp://dx.doi.org/10.1134/1.2163917en_US
dc.source.titleJournal of Experimental and Theoretical Physicsen_US
dc.subjectElectric conductanceen_US
dc.subjectElectric fieldsen_US
dc.subjectElectron transitionsen_US
dc.subjectElectronsen_US
dc.subjectMagnetic fieldsen_US
dc.subjectMathematical transformationsen_US
dc.subjectSwitchesen_US
dc.subjectCoherent dynamic behavioren_US
dc.subjectMacromolecular conducting ringsen_US
dc.subjectMesoscopic Aharonov-Bohm loopsen_US
dc.subjectStatic propertiesen_US
dc.subjectElectric currentsen_US
dc.titleSpontaneous and persistent currents in mesoscopic Aharonov-Bohm loops: Static properties and coherent dynamic behavior in crossed electric and magnetic fieldsen_US
dc.typeArticleen_US

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