title: Coherent energy transport in classical nonlinear oscillators: An analogy with the Josephson effect.
abstract: 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.
authors.affiliation: Department of Physics and Astronomy, Uppsala University, Box 516, SE-75120 Uppsala, Sweden.|Department of Materials and Nanophysics, School of Information and Communication Technology, Electrum 229, Royal Institute of Technology, SE-16440 Kista, Sweden.
authors.forename: Simone
authors.initials: S
authors.lastname: Borlenghi
authors.affiliation: Centre de Biophysique Moléculaire (CBM), CNRS-UPR 4301, Rue Charles Sadron, F-45071 Orléans, France.
authors.forename: Stefano
authors.initials: S
authors.lastname: Iubini
authors.affiliation: Istituto dei Sistemi Complessi, Consiglio Nazionale delle Ricerche, Unità Operativa di Firenze, Via Madonna del Piano 10, I-50019 Sesto Fiorentino, Italy.
authors.forename: Stefano
authors.initials: S
authors.lastname: Lepri
authors.affiliation: Department of Materials and Nanophysics, School of Information and Communication Technology, Electrum 229, Royal Institute of Technology, SE-16440 Kista, Sweden.
authors.forename: Lars
authors.initials: L
authors.lastname: Bergqvist
authors.affiliation: Department of Physics and Astronomy, Uppsala University, Box 516, SE-75120 Uppsala, Sweden.|Department of Materials and Nanophysics, School of Information and Communication Technology, Electrum 229, Royal Institute of Technology, SE-16440 Kista, Sweden.
authors.forename: Anna
authors.initials: A
authors.lastname: Delin
authors.affiliation: Department of Physics and Astronomy, Uppsala University, Box 516, SE-75120 Uppsala, Sweden.
authors.forename: Jonas
authors.initials: J
authors.lastname: Fransson
mesh_terms: D003198:Computer Simulation; D020342:Finite Element Analysis; D060526:Magnetic Fields; D008962:Models, Theoretical; D049329:Nanostructures / Q000737:chemistry; D017711:Nonlinear Dynamics; D010507:Periodicity; D013816:Thermodynamics