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Breathers and thermal relaxation in Fermi-Pasta-Ulam arrays
Ramon Reigada1, Antonio Sarmiento, Katja Lindenberg
1Departament de Quimica Fisica, Universitat de Barcelona, Avda. Diagonal 647, 08028 Barcelona, Spain.
Chaos (Woodbury, N.Y.)
|June 5, 2003
Abstract:
Breather stability and longevity in thermally relaxing nonlinear arrays depend sensitively on their interactions with other excitations. We review numerical results for the relaxation of breathers in Fermi-Pasta-Ulam arrays, with a specific focus on the different relaxation channels and their dependence on the interparticle interactions, dimensionality, initial condition, and system parameters.