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Phys Rev Lett. 2000 Apr 3;84(14):3065-8.

Transverse instability of solitary waves in the generalized kadomtsev-petviashvili equation

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  • 1Graduate School of Science and Technology, Kobe University, Rokkodai, Nada, Kobe 657-8501, Japan.


The linear stability of planar solitary waves with respect to long-wavelength transverse perturbations is studied in the framework of the generalized Kadomtsev-Petviashvili equation. It is newly discovered that for some nonlinearities in this family, the solitary waves could be transversely unstable even in a medium with negative dispersion. In the case of positive dispersion, they are found to be always unstable.

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