Two-dimensional map for a curved Fermi-Pasta-Ulam chain.

  • Ranja Sarkar
  • Published 2008 in
    Physical review. E, Statistical, nonlinear, and…


A two-dimensional map is derived from the model of a curved Fermi-Pasta-Ulam (FPU) chain which supports exact discrete breather (DB) solutions with frequencies lying outside the linear spectrum or phonon band. The stability of the equilibrium points of the two-dimensional map is examined and the nature of the trajectories is numerically studied. The map… (More)


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