Linear response in the nonequilibrium zero range process

Christian Maes and Alberto Salazar

Chaos, Solitons & Fractals, 2014, vol. 64, issue C, 78-87

Abstract: We explore a number of explicit response formulæ around the boundary driven zero range process to changes in the exit and entrance rates. In such a nonequilibrium regime kinetic (and not only thermodynamic) aspects make a difference in the response. Apart from a number of formal approaches, we illustrate a general decomposition of the linear response into entropic and frenetic contributions, the latter being realized from changes in the dynamical activity at the boundaries. In particular in this way one obtains nonlinear modifications to the Green–Kubo relation. We end by bringing some general remarks about the situation where that nonequilibrium response remains given by the (equilibrium) Kubo formula such as for the density profile in the boundary driven Lorentz gas.

Date: 2014
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Persistent link: https://EconPapers.repec.org/RePEc:eee:chsofr:v:64:y:2014:i:c:p:78-87

DOI: 10.1016/j.chaos.2013.09.004

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