Localization and coherence in nonintegrable systems

Benno Rumpf, Alan C. Newell

Research output: Contribution to journalArticlepeer-review

49 Scopus citations


We study the irreversible dynamics of nonlinear, nonintegrable Hamiltonian oscillator chains approaching their statistical asymptotic states. In systems constrained by more than one conserved quantity, the partitioning of the conserved quantities leads naturally to localized and coherent structures. If the phase space is compact, the final equilibrium state is governed by entropy maximization and the coherent structures are stable lumps. In systems where the phase space is not compact, the coherent structures can be collapsed, represented in phase space by a heteroclinic connection of some unstable saddle to infinity.

Original languageEnglish (US)
Pages (from-to)162-191
Number of pages30
JournalPhysica D: Nonlinear Phenomena
Issue number1-4
StatePublished - Oct 1 2003


  • Localized structures
  • Statistical physics

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Mathematical Physics
  • Condensed Matter Physics
  • Applied Mathematics


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