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arXiv · 0908.2152

Numerical study on diverging probability density function of flat-top solitons in an extended Korteweg-de Vries equation

Yeojin Chung
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Abstract

We consider an extended Korteweg-de Vries (eKdV) equation, the usual Korteweg-de Vries equation with inclusion of an additional cubic nonlinearity. We investigate the statistical behaviour of flat-top solitary waves described by an eKdV equation in the presence of weak dissipative disorder in the linear growth/damping term. With the weak disorder in the system, the amplitude of solitary wave randomly fluctuates during evolution. We demonstrate numerically that the probability density function of a solitary wave parameter $κ$ which characterizes the soliton amplitude exhibits loglognormal divergence near the maximum possible $κ$ value.

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Yeojin Chung. 2009-08-15. Numerical study on diverging probability density function of flat-top solitons in an extended Korteweg-de Vries equation. https://doi.org/10.1088/1751-8113%2F42%2F47%2F475002

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