Nonlinear Sciences – Pattern Formation and Solitons
Scientific paper
1998-12-25
Nonlinear Sciences
Pattern Formation and Solitons
latex, no figures, submitted to Physics Letters A
Scientific paper
10.1016/S0375-9601(99)00148-6
We obtain analytical expressions for an effective potential of interaction between two- and three-dimensional (2D and 3D) solitons (including the case of 2D vortex solitons) belonging to two different modes which are incoherently coupled by cross-phase modulation. The derivation is based on calculation of the interaction term in the full Hamiltonian of the system. An essential peculiarity is that, in the 3D case, as well as in the case of 2D solitons with unequal masses, the main contribution to the interaction potential originates from a vicinity of one or both solitons, similarly to what was recently found in the 2D and 3D single-mode systems, while in the case of identical 2D solitons, the dominating area covers all the space between the solitons. Unlike the single-mode systems,_stable_ bound states of mutually orbiting solitons are shown to be possible in the bimodal system.
Desyatnikov Anton
Maimistov Andrey
Malomed Boris
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