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- Title
Multi-fold Darboux transforms and interaction solutions of localized waves to a general vector mKdV equation.
- Authors
Li, Ruomeng; Li, Yihao; Geng, Jingru
- Abstract
In this paper, a new general vector mKdV equation associated with the (m + n + 1) × (m + n + 1) matrix spectral problem is proposed and its integrable reduced equation is derived. Based on the gauge transformations between the resulting Lax pairs and Riccati equations related to the spectral problem and auxiliary spectral problem, multi-fold Darboux transforms of the general vector mKdV equation and its integrable reduced equation are constructed, from which an algebraic algorithm for solving the general vector mKdV equation and its integrable reduced equation is given. As an illustrative example of the application of the Darboux transform, one obtains localized wave solutions of the integrable reduced equation such as solitons, soliton molecules, breathers and rogue waves. It is important and interesting that the integrable reduced equation has three new characteristics: (i) it has a two-atom soliton molecule and the two atoms overlap so well that it has only one crest, but it behaves like a two-atom soliton when it interacts with a third solitary wave; (ii) the interaction of its two waves may cause singular waves; and (iii) its analytical solution can be obtained from its singular seed solutions. In addition, the interaction dynamics of various localized wave solutions is analyzed by choosing appropriate parameters.
- Subjects
LAX pair; ROGUE waves; GAUGE invariance; RICCATI equation; EQUATIONS; ANALYTICAL solutions
- Publication
Nonlinear Dynamics, 2023, Vol 111, Issue 13, p12525
- ISSN
0924-090X
- Publication type
Article
- DOI
10.1007/s11071-023-08482-y