Configurations and Observables in an Ising Model with Heat Flow

Details Configurations and Observables in an Ising Model with Heat Flow Configurations and Observables in an Ising Model with Heat Flow

2008-03-26

arxiv.org/abs/0803.3698v1

Eur. Phys. J. B 60 4 (2007) 499-506

Physics

Condensed Matter

Statistical Mechanics

Scientific paper

10.1140/epjb/e2008-00012-6

We study a two dimensional Ising model between thermostats at different temperatures. By applying the recently introduced KQ dynamics, we show that the system reaches a steady state with coexisting phases transversal to the heat flow. The relevance of such complex states on thermodynamic or geometrical observables is investigated. In particular, we study energy, magnetization and metric properties of interfaces and clusters which, in principle, are sensitive to local features of configurations. With respect to equilibrium states, the presence of the heat flow amplifies the fluctuations of both thermodynamic and geometrical observables in a domain around the critical energy. The dependence of this phenomenon on various parameters (size, thermal gradient, interaction) is discussed also with reference to other possible diffusive models.

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