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dc.contributor.authorPollock, Felix A.
dc.contributor.authorMcCutcheon, Dara P. S.
dc.contributor.authorLovett, Brendon William
dc.contributor.authorGauger, Erik M.
dc.contributor.authorNazir, Ahsan
dc.identifier.citationPollock , F A , McCutcheon , D P S , Lovett , B W , Gauger , E M & Nazir , A 2013 , ' A multi-site variational master equation approach to dissipative energy transfer ' , New Journal of Physics , vol. 15 , 075018 .
dc.identifier.otherPURE: 79638651
dc.identifier.otherPURE UUID: 71fcd860-f447-4cc8-934c-44b315c1fa6e
dc.identifier.otherWOS: 000321945400003
dc.identifier.otherScopus: 84881146977
dc.identifier.otherORCID: /0000-0001-5142-9585/work/47136572
dc.description.abstractUnitary transformations can allow one to study open quantum systems in situations for which standard, weak-coupling type approximations are not valid. We develop here an extension of the variational (polaron) transformation approach to open system dynamics, which applies to arbitrarily large exciton transport networks with local environments. After deriving a time-local master equation in the transformed frame, we go on to compare the population dynamics predicted using our technique with other established master equations. The variational frame dynamics are found to agree with both weak coupling and full polaron master equations in their respective regions of validity. In parameter regimes considered difficult for these methods, the dynamics predicted by our technique are found to interpolate between the two. The variational method thus gives insight, across a broad range of parameters, into the competition between coherent and incoherent processes in determining the dynamical behaviour of energy transfer networks.
dc.relation.ispartofNew Journal of Physicsen
dc.rights© 2013 IOP Publishing and Deutsche Physikalische Gesellschaft. Felix A Pollock et al 2013 New J. Phys. 15 075018. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.en
dc.subjectReduced density matricesen
dc.subjectQuantum time evolutionen
dc.subjectPhysiological temperatureen
dc.subjectExcitation transferen
dc.subjectTensor propagatoren
dc.subjectPolaron motionen
dc.titleA multi-site variational master equation approach to dissipative energy transferen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews. Condensed Matter Physicsen
dc.description.statusPeer revieweden

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