Fluctuation relations in non-equilibrium stationary states of Ising models
Date of Issue2009
School of Physical and Mathematical Sciences
Fluctuation relations for the entropy production in non-equilibrium stationary states of Ising models are investigated by means of Monte Carlo simulations. Systems in contact with heat baths at two different temperatures or subject to external driving will be studied. In the first case, considering different kinetic rules and couplings with the baths, the behaviors of the probability distributions of the heat exchanged in time τ with the thermostats, both in the disordered phase and in the low temperature phase, are discussed. The fluctuation relation is always followed in the large τ limit and deviations from linear response theory are observed. Finite τ corrections are shown to obey a scaling behavior. In the other case the system is in contact with a single heat bath, but work is done by shearing it. Also for this system, using the statistics collected for the mechanical work we show the validity of the fluctuation relation and the preasymptotic corrections behave analogously to those for the case with two baths.
Journal of statistical mechanics : theory and experiment
© 2009 IOP Publishing Ltd. This is the author created version of a work that has been peer reviewed and accepted for publication by Journal of statistical mechanics: theory and experiment, IOP Publishing Ltd. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1088/1742-5468/2009/01/P01053].