Coherent energy transport in classical nonlinear oscillators: An analogy with the Josephson effect
Simone Borlenghi, Stefano Iubini, Stefano Lepri, Lars Bergqvist, Anna Delin, Jonas Fransson
DOI 10.1103/PhysRevE.91.040102 · Physical Review E
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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.
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