Bona Fide Thermodynamic Temperature in Nonequilibrium Kinetic Ising Models

Details Bona Fide Thermodynamic Temperature in Nonequilibrium Kinetic Ising Models Bona Fide Thermodynamic Temperature in Nonequilibrium Kinetic Ising Models

2003-08-08

arxiv.org/abs/cond-mat/0308178v1

Phys. Rev. Letters 91, 267205 (2003)

Physics

Condensed Matter

Statistical Mechanics

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.91.267205

We show that a nominal temperature can be consistently and uniquely defined everywhere in the phase diagram of large classes of nonequilibrium kinetic Ising spin models. In addition, we confirm the recent proposal that, at critical points, the large-time ``fluctuation-dissipation ratio'' $X_\infty$ is a universal amplitude ratio and find in particular $X_\infty \approx 0.33(2)$ and $X_\infty = 1/2$ for the magnetization in, respectively, the two-dimensional Ising and voter universality classes.

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