Noise simulations of an Ising model of glassy kinetics

G. B. Alers, M. B. Weissman, A. Kinzig, N. Israeloff

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

Non-Gaussian properties of equilibrium magnetization fluctuations in a two-spin facilitated Ising model of the glass transition were studied by Monte Carlo simulation. The noise had properties unlike parallel distributed kinetics and similar to those expected for hierarchical kinetic schemes. The power spectrum had a region of slightly steeper than 1/f frequency dependence consistent with a highly stretched exponential response function. Fluctuations of noise power in different octaves were found to be correlated over a frequency range much larger than would be expected for systems in which each site contributed noise with one time constant. Further, higher-order non-Gaussian power spectra had a similar 1/f behavior demonstrating an overall order invariance in higher moments of the noise. This behavior might be used to identify similar kinetic cooperativity in real systems.

Original languageEnglish (US)
Pages (from-to)8429-8434
Number of pages6
JournalPhysical Review B
Volume36
Issue number16
DOIs
StatePublished - Jan 1 1987
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics

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