TEMPERATURE OF NONEQUILIBRIUM LATTICE SYSTEMS

Alberto Petri and M. J. de Oliveira ()
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Alberto Petri: CNR - Istituto dei Sistemi Complessi, via del Fosso del Cavaliere 100, 00133 Roma, Italy
M. J. de Oliveira: Instituto de Física, Universidade de São Paulo, Caixa Postal 66318, 05315-970 São Paulo, São Paulo, Brazil

International Journal of Modern Physics C (IJMPC), 2006, vol. 17, issue 12, 1703-1715

Abstract: We investigate the thermal quench of Ising and Potts models via Monte Carlo dynamics. We find that the local distribution of the site-site interaction energy has the same form as in the equilibrium case, a result that allows us to define an instantaneous temperature θ during the systems relaxation. We also find that, after an undercritical quench, θ equals the heat bath temperature in a finite time, while the total system energy is still decreasing due to the coarsening process.

Keywords: Monte Carlo simulation; nonequilibrium systems; quenching; 05.50.+q; 64.60.Cn; 02.50.Ey; 05.70.Ln (search for similar items in EconPapers)
Date: 2006
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DOI: 10.1142/S012918310601011X

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