Control of Metastable States by Heat Flux in the Hamiltonian Potts Model

Abstract

The local equilibrium thermodynamics is a basic assumption of macroscopic descriptions of the out of equilibrium dynamics for Hamiltonian systems. We numerically analyze the Hamiltonian Potts model in two dimensions to study the violation of the assumption for phase coexistence in heat conduction. We observe that the temperature of the interface between ordered and disordered states deviates from the equilibrium transition temperature, indicating that metastable states at equilibrium are stabilized by the influence of a heat flux. We also find that the deviation is described by the formula proposed in an extended framework of the thermodynamics.

20 pages, 10 figures

References in corpus (5)

• Enhanced heat transport by turbulent two-phase Rayleigh-Bénard convection
• Intensive thermodynamic parameters in nonequilibrium systems
• Liquid-gas transitions in steady heat conduction
• Unique extension of the maximum entropy principle to phase coexistence in heat conduction
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Cited by in corpus (2)

• Non-equilibrium coexistence between a fluid and a hotter or colder crystal of granular hard disks
• Violation of local equilibrium thermodynamics in one-dimensional Hamiltonian-Potts model