Association Journal of CSIAM
Supervised by Ministry of Education of PRC
Sponsored by Xi'an Jiaotong University
ISSN 1005-3085  CN 61-1269/O1

Chinese Journal of Engineering Mathematics ›› 2022, Vol. 39 ›› Issue (2): 330-340.doi: 10.3969/j.issn.1005-3085.2022.02.012

Previous Articles    

Darboux Transformation of the Integrable Coupling AKNS Equations and Its Exact Explicit Solutions

CHENG Jianling1,   FENG Yihu2   

  1. 1. School of Education, Sias University, Xinzheng 451100
    2. Department of Electronics and Information Engineering, Bozhou College, Bozhou 236800
  • Online:2022-04-15 Published:2022-06-15
  • Supported by:
    The National Natural Science Foundation of China (11975145); the Natural Science Foundation of the Education Department of Anhui Province (KJ2021A11500); the Excellent Teaching Team of Bozhou University (2021XJXM006).

Abstract:

For many physical phenomena, it is necessary to establish wave models with two or more components to explain different patterns, frequencies and polarization phenomenna. In addition, only multi-component systems can explain the energy exchange of multiple physical fields theoretically and practically. Therefore, for a integrable system, how to construct a non-trivial differential equation system that is integrable and contains the original system as a subsystem is one of the important problems in the study of integrable coupling. In this work, the integrable couplings of the Ablowitz-Kaup-Newell-Segur equation are constructed based on a stationary equation. Then a Darboux transformation in which the elements can be expressed by the quotient of two determinants is obtained, and the production process is proved strictly. By comparing the forms and characteristics of the one-fold Darboux transformation, $N$-fold Darboux transformation formula which can be demonstrated as determinants is derived. Therefore, by means of seed solutions and $N$-fold Darboux transformation, any-order soliton solutions can be derived. As the application of Darboux tarnsformation, we solve the exact explicit one-soliton solutions.

Key words: Darboux transformation, couplings of the AKNS equation, exact explicit solutions

CLC Number: