Possibilities and limitations of Gaussian-closure approximations for phase-ordering dynamics

Chuck Yeung, Y. Oono, A. Shinozaki

Research output: Contribution to journalArticlepeer-review


The nonlinear equations describing phase-ordering dynamics can be closed by assuming the existence of an underlying Gaussian stochastic field which is nonlinearly related to the observable order-parameter field. We discuss the relation between different implementations of the Gaussian assumption and consider the limitations of this assumption for phase-ordering dynamics. The fact that the different approaches give different results is a sign of the breakdown of the Gaussian assumption. We discuss both the nonconserved and conserved order-parameter cases. We demonstrate that the Gaussian assumption cannot describe the large length-scale behavior in the latter case.

Original languageEnglish (US)
Pages (from-to)2693-2699
Number of pages7
JournalPhysical Review E
Issue number4
StatePublished - 1994
Externally publishedYes

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Statistics and Probability
  • Condensed Matter Physics


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