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dc.contributor.authorTuovinen, Riku
dc.contributor.authorSäkkinen, Niko
dc.contributor.authorKarlsson, Daniel
dc.contributor.authorStefanucci, Gianluca
dc.contributor.authorvan Leeuwen, Robert
dc.date.accessioned2016-07-12T10:42:28Z
dc.date.available2016-07-12T10:42:28Z
dc.date.issued2016
dc.identifier.citationTuovinen, R., Säkkinen, N., Karlsson, D., Stefanucci, G., & van Leeuwen, R. (2016). Phononic heat transport in the transient regime: An analytic solution. <i>Physical Review B</i>, <i>93</i>(21), Article 214301. <a href="https://doi.org/10.1103/PhysRevB.93.214301" target="_blank">https://doi.org/10.1103/PhysRevB.93.214301</a>
dc.identifier.otherCONVID_26113220
dc.identifier.otherTUTKAID_70633
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/50803
dc.description.abstractWe investigate the time-resolved quantum transport properties of phonons in arbitrary harmonic systems connected to phonon baths at different temperatures. We obtain a closed analytic expression of the time-dependent one-particle reduced density matrix by explicitly solving the equations of motion for the nonequilibrium Green’s function. This is achieved through a well-controlled approximation of the frequency-dependent bath self-energy. Our result allows for exploring transient oscillations and relaxation times of local heat currents, and correctly reduces to an earlier known result in the steady-state limit. We apply the formalism to atomic chains, and benchmark the validity of the approximation against full numerical solutions of the bosonic Kadanoff-Baym equations for the Green’s function. We find good agreement between the analytic and numerical solutions for weak contacts and baths with a wide energy dispersion. We further analyze relaxation times from low to high temperature gradients.
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.relation.ispartofseriesPhysical Review B
dc.subject.otherquantum transport
dc.subject.otherheat transport
dc.titlePhononic heat transport in the transient regime: An analytic solution
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-201607123576
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.contributor.oppiaineNanoscience Centerfi
dc.contributor.oppiaineNanoscience Centeren
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.date.updated2016-07-12T09:15:11Z
dc.type.coarhttp://purl.org/coar/resource_type/c_2df8fbb1
dc.description.reviewstatuspeerReviewed
dc.relation.issn1098-0121
dc.relation.numberinseries21
dc.relation.volume93
dc.type.versionpublishedVersion
dc.rights.copyright© 2016 American Physical Society. Published in this repository with the kind permission of the publisher.
dc.rights.accesslevelopenAccessfi
dc.relation.grantnumber267839
dc.subject.ysofononit
jyx.subject.urihttp://www.yso.fi/onto/yso/p28089
dc.relation.doi10.1103/PhysRevB.93.214301
dc.relation.funderSuomen Akatemiafi
dc.relation.funderAcademy of Finlanden
jyx.fundingprogramAkatemiahanke, SAfi
jyx.fundingprogramAcademy Project, AoFen
jyx.fundinginformationWe thank the Vilho, Yrjo and Kalle V ¨ ais ¨ al¨ a Foundation, the Academy of Finland (Grant No. 267839), MIUR FIRB Grant No. RBFR12SW0, and EC funding through the RISE Co- ExAN (GA644076) for financial support. We further wish to acknowledge CSC–IT Center for Science, Finland, for computational resources.
dc.type.okmA1


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