Coarsening Dynamics in a Simplified DNLS Model

Stefano Iubini*, Antonio Politi, Paolo Politi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)


We investigate the coarsening evolution occurring in a simplified stochastic model of the Discrete NonLinear Schrödinger (DNLS) equation in the so-called negative-temperature region. We provide an explanation of the coarsening exponent n=1/3, by invoking an analogy with a suitable exclusion process. In spite of the equivalence with the exponent observed in other known universality classes, this model is certainly different, in that it refers to a dynamics with two conservation laws.

Original languageEnglish
Pages (from-to)1057-1073
Number of pages17
JournalJournal of Statistical Physics
Issue number4
Early online date11 Dec 2013
Publication statusPublished - Feb 2014


  • Breathers
  • Coarsening
  • Exclusion processes


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