Soliton stability and collapse in the discrete nonpolynomial Schrodinger equation with dipole-dipole interactions

Details Soliton stability and collapse in the discrete nonpolynomial Schrodinger equation with dipole-dipole interactions Soliton stability and collapse in the discrete nonpolynomial Schrodinger equation with dipole-dipole interactions

2009-03-20

arxiv.org/abs/0903.3517v1

Nonlinear Sciences

Pattern Formation and Solitons

6 figures

Scientific paper

The stability and collapse of fundamental unstaggered bright solitons in the discrete Schrodinger equation with the nonpolynomial on-site nonlinearity, which models a nearly one-dimensional Bose-Einstein condensate trapped in a deep optical lattice, are studied in the presence of the long-range dipole-dipole (DD) interactions. The cases of both attractive and repulsive contact and DD interaction are considered. The results are summarized in the form of stability/collapse diagrams in the parametric space of the model, which demonstrate that the the attractive DD interactions stabilize the solitons and help to prevent the collapse. Mobility of the discrete solitons is briefly considered too.

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