Berlin 2015 – scientific programme
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DY: Fachverband Dynamik und Statistische Physik
DY 27: Statistical Physics far from Thermal Equilibrium - Part I
DY 27.5: Talk
Wednesday, March 18, 2015, 10:45–11:00, BH-N 334
Josephson effect and coherent energy transport in classical nonlinear oscillators — Simone Borlenghi1,2, •Stefano Iubini3, Stefano Lepri4, Lars Bergqvist1, Anna Delin1,2, and Jonas Fransson2 — 1Department of Material and Nano-Physics, School of Information and Communication Technology, KTH Royal Institute of Technology, Stocholm, Sweden — 2Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden — 3Centre de Biophysique Moléculaire (CBM), CNRS-UPR 4301 Rue Charles Sadron, F-45071 Orléans, France — 4Istituto dei Sistemi Complessi, CNR Unità operativa di Firenze, Sesto Fiorentino, Italy
The standard approach to non-equilibrium thermodynamics describes transport in terms of generalised forces and coupled currents, a typical example being the Fourier law that relates temperature gradient to the heat flux. In this talk, we discuss the possibility to generate a persistent energy currents in a lattice of classical nonlinear oscillators with uniform temperature and chemical potential. In strong analogy with the well known Josephson effect, the currents are generated only by the phase differences between the oscillators. The phases play the role of additional thermodynamical forces, that drive the system out of equilibrium. Our results apply to a large class of oscillators and indicate novel ways to practically control the propagation of coupled currents and rectification effects in many different devices. They also suggest a simple, macroscopic setup for studying a phenomenon which hitherto have only been observed in microscopic, quantum-mechanical systems. (preprint arXiv:1411.5170)