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Coherent energy transport in classical nonlinear oscillators: An analogy with the Josephson effect
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics. Uppsala University, Sweden.
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics.ORCID iD: 0000-0003-4341-5663
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2015 (English)In: Physical Review E. Statistical, Nonlinear, and Soft Matter Physics, ISSN 1539-3755, E-ISSN 1550-2376, Vol. 91, no 4, 040102Article in journal (Refereed) Published
Abstract [en]

By means of a simple theoretical model and numerical simulations, we demonstrate the presence of persistent energy currents in a lattice of classical nonlinear oscillators with uniform temperature and chemical potential. In analogy with the well-known Josephson effect, the currents are proportional to the sine of the phase differences between the oscillators. Our results elucidate general aspects of nonequilibrium thermodynamics and point towards a way to practically control transport phenomena in a large class of systems. We apply the model to describe the phase-controlled spin-wave current in a bilayer nanopillar.

Place, publisher, year, edition, pages
2015. Vol. 91, no 4, 040102
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-171692DOI: 10.1103/PhysRevE.91.040102ISI: 000353463600001Scopus ID: 2-s2.0-84929103457OAI: oai:DiVA.org:kth-171692DiVA: diva2:844740
Funder
Swedish Research CouncilSwedish Energy AgencyKnut and Alice Wallenberg FoundationSwedish eā€Science Research CenterSwedish Foundation for Strategic Research EU, FP7, Seventh Framework Programme, GA 323901
Note

QC 20150807

Available from: 2015-08-07 Created: 2015-08-05 Last updated: 2017-12-04Bibliographically approved

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Bergqvist, LarsDelin, Anna

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