Variational approximations of bifurcations of asymmetric solitons in cubic-quintic nonlinear Schrödinger lattices Academic Article uri icon

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abstract

  • Using a variational approximation we study discrete solitons of a nonlinear Schroedinger lattice with a cubic-quintic nonlinearity. Using an ansatz with six parameters we are able to approximate bifurcations of asymmetric solutions connecting site-centered and bond-centered solutions and resulting in the exchange of their stability. We show that the numerically exact and variational approximations are quite close for solitons of small powers.

publication date

  • December 2010