A new two-component sasa-satuma equation: large-time asymaptotics on the line
Abstract
We consider the initial value problem for a new two-component Sasa-Satsuma equation associated with the fourth-order Lax pair with decaying initial data on the line. By utilizing the spectral analysis, the solution of the new two-component Sasa-Satsuma system is transformed into the solution of a fourth-order matrix Riemann-Hilbert problem. Then the long-time asymptotics of the solution is obtained by means of the nonlinear steepest descent method of Deift and Zhou for oscillatory Riemann-Hilbert problems. We show that there are three main regions in the half-plane, where the asymptotics has qualitatively different forms: a left fast decaying sector, a central Painleve sector where the asymptotics is described in terms of the solution of a new coupled Painleve II equation which is related to a fourth-order matrix Riemann-Hilbert problem, and a right slowly decaying oscillatory sector.
Keywords
Cite
@article{arxiv.2309.16091,
title = {A new two-component sasa-satuma equation: large-time asymaptotics on the line},
author = {Xiaodan Zhao and Lei Wang},
journal= {arXiv preprint arXiv:2309.16091},
year = {2023}
}