Large and infinite order solitons of the coupled nonlinear Schrödinger equation

2021/03/29 by Liming Ling, Ling, Liming, Xiaoen Zhang +1 · 1 citation
Physics and Astronomy · #35Q15 #35Q51 #35Q55 #37K10 #37K15 #37K40 #Exactly Solvable and Integrable Systems (nlin.SI) #FOS: Physical sciences #msc:35Q15 #msc:35Q51 #msc:35Q55 #msc:37K10 #msc:37K15 #msc:37K40 #nlin.SI

paper · pdf · doi:10.48550/arxiv.2103.15373

61pages, 29figures

arxiv created 2021/06/04 · arxiv updated 2021/06/07

Abstract

We study the large order and infinite order soliton of the coupled nonlinear Schrodinger equation with the Riemann-Hilbert method. By using the Riemann-Hilbert representation for the high order Darboux dressing matrix, the large order and infinite order solitons can be analyzed directly without using inverse scattering transform. We firstly disclose the asymptotics for large order soliton, which is divided into four different regions -- the elliptic function region, the non-oscillatory region, the exponential and algebraic decay region. We verify the consistence between asymptotic expression and exact solutions by the Darboux dressing method numerically. Moreover, we consider the property and dynamics for infinite order solitons -- a special limitation for the larger order soliton. It is shown that the elliptic function and exponential region will disappear for the infinite order solitons.

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• Long-time asymptotics of the coupled nonlinear Schödinger equation in a weighted Sobolev space

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