Nonequilibrium critical relaxation at a first-order phase transition point

M. Pleimling, F. Iglói

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We study numerically the nonequilibrium dynamical behavior of an Ising model with mixed two-spin and four-spin interactions after a sudden quench from the high-temperature phase to the first-order phase transition point. The autocorrelation function is shown to approach its limiting value, given by the magnetization in the ordered phase at the transition point, mc, through a stretched exponential decay. On the other hand relaxation of the magnetization starting with an uncorrelated initial state with magnetization, mi, approaches either mc, for mi > 0.5, or zero, for mi <0.5. For small mi and for mi slightly larger than 0.5 the relaxation of the magnetization shows an asymptotic power law time dependence, thus from a nonequilibrium point of view the transition is continuous.

Original languageEnglish
Article number56002
JournalEPL
Volume79
Issue number5
DOIs
Publication statusPublished - Sep 1 2007

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transition points
magnetization
Ising model
autocorrelation
time dependence
decay
interactions

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Nonequilibrium critical relaxation at a first-order phase transition point. / Pleimling, M.; Iglói, F.

In: EPL, Vol. 79, No. 5, 56002, 01.09.2007.

Research output: Contribution to journalArticle

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