CRITICAL PROPERTIES OF 3D ISING SYSTEMS WITH NON-HAMILTONIAN DYNAMICS

J.R. Heringa, H.W.J. Blöte and A. Hoogland
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J.R. Heringa: Laboratorium voor Technische Natuurkunde, Technische Universiteit Delft P.O. Box 5046, 2600 GA Delft, The Netherlands
H.W.J. Blöte: Laboratorium voor Technische Natuurkunde, Technische Universiteit Delft P.O. Box 5046, 2600 GA Delft, The Netherlands
A. Hoogland: Laboratorium voor Technische Natuurkunde, Technische Universiteit Delft P.O. Box 5046, 2600 GA Delft, The Netherlands

International Journal of Modern Physics C (IJMPC), 1994, vol. 05, issue 03, 589-598

Abstract: We investigate two three-dimensional Ising models with non-Hamiltonian Glauber dynamics. The transition probabilities of these models can, just as in the case of equilibrium models, be expressed in terms of Boltzmann factors depending only on the interacting spins and the bond strengths. However, the bond strength associated with each lattice edge assumes different values for the two spins involved. The first model has cubic symmetry and consists of two sublattices at different temperatures. In the second model a preferred direction is present. These two models are investigated by Monte Carlo simulations on the Delft Ising System Processor. Both models undergo a phase transition between an ordered and a disordered state. Their critical properties agree with Ising universality. The second model displays magnetization bistability.

Keywords: Ising Model; Critical Phenomena; Bistability; Special-Purpose Computer; Non-Equilibrium Dynamics (search for similar items in EconPapers)
Date: 1994
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DOI: 10.1142/S0129183194000763

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