Frequency-dependent current correlation functions from scattering theory

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en Salo, J. Hekking, F. W. J. Pekola, Jukka P. 2015-05-26T09:01:25Z 2015-05-26T09:01:25Z 2006
dc.identifier.citation Salo, J. & Hekking, F. W. J. & Pekola, Jukka. 2006. Frequency-dependent current correlation functions from scattering theory. Physical Review B. Volume 74, Issue 12. 125427/1-13. ISSN 1098-0121 (printed). DOI: 10.1103/physrevb.74.125427. en
dc.identifier.issn 1098-0121 (printed)
dc.description.abstract We present a general formalism based on scattering theory to calculate quantum correlation functions involving several time-dependent current operators. A key ingredient is the causality of the scattering matrix, which allows one to deal with arbitrary correlation functions. The formalism proves useful, e.g., in view of recent developments in full counting statistics of charge transfer, where detecting schemes have been proposed for measurement of frequency dependent spectra of higher moments. Some of these schemes are different from the well-known fictitious spin detector and therefore generally involve calculation of non-Keldysh-contour-ordered correlation functions. As an illustration of the approach we consider various third order correlation functions of current, including the usual third cumulant of current statistics. We investigate the frequency dependence of these correlation functions explicitly in the case of energy-independent scattering. The results can easily be generalized to the calculation of arbitrary nth order correlation functions, or to include the effect of interactions. en
dc.format.extent 125427/1-13
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher American Physical Society (APS) en
dc.relation.ispartofseries Physical Review B en
dc.relation.ispartofseries Volume 74, Issue 12
dc.rights © 2006 American Physical Society (APS). en
dc.subject.other Physics en
dc.title Frequency-dependent current correlation functions from scattering theory en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.rights.holder American Physical Society (APS) Perustieteiden korkeakoulu fi School of Science en
dc.contributor.department Department of Applied Physics en
dc.contributor.department Teknillisen fysiikan laitos fi
dc.subject.keyword scattering theory en
dc.subject.keyword current correlation functions en
dc.subject.keyword time-dependent current operators en
dc.identifier.urn URN:NBN:fi:aalto-201505262888
dc.type.dcmitype text en
dc.identifier.doi 10.1103/physrevb.74.125427
dc.type.version Final published version en

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