BGU Physics Department |
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## Non-equilibrium steady state of stochastic circuits ()Doron Cohen
The study of systems with non-equilibrium steady state (NESS) has become of great interest in recent years. The paradigm for NESS is a system which is coupled to two equilibrated reservoirs "A" and "B" that are characterized by different temperatures
Upper figure: Illustration of a prototype model system: a ring that is made up of N isolated sites with on site energies Lower figure: In the upper panel the current in the ring is plotted as a function of the scaled driving intensity.
In the lower panel this dependence is imaged for various strengths ("sigma") of disorder (each row corresponds to one plot as above).
More generally we have analyzed the statistics of the current over many realizations of the disorder.
In subsequent studies we have addressed questions that concern the relaxation of such currents, and how the relaxation depends on percolation and localization properties of the model. Currently we are trying to extend the theory, considering general stochastic active networks.
The above figure is taken form our
Nature Scientific Report publication entitled "Percolation, sliding, localization and relaxation in topologically closed circuits". The radial direction is time and the angle is the position. (a) For small bias the dynamics is over-damped. (b) For large bias the dynamics is under-damped. The transition has to do with the de-localization of the eigen-modes, and surprisingly happens before the "sliding transition" that had been widely discussed in past literature.
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