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arXiv 1502.02759nlin.SI
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二维多分量Yajima-Oikawa系统的多暗孤子解

Multi-dark soliton solutions of the two-dimensional multi-component Yajima-Oikawa systems

Junchao Chen, Yong Chen, Bao-Feng Feng, Ken-ichi Maruno

摘要:

给出了二维多分量孤子系统的多暗孤子解的一般形式。详细研究了二维和一维多分量Yajima-Oikawa(YO)系统(通常称为二维和一维多分量长波-短波共振相互作用系统)的多暗孤子解。以具有两个短波分量和一个长波分量的二维耦合YO系统为例,利用KP族约化方法,得到了二维耦合YO系统的Gram型和Wronski型行列式形式的广义$N$-暗-暗孤子解.通过施加一定的约束条件,进一步得到了一维耦合YO系统的广义$N$-暗-暗孤子解。详细分析了单暗-暗孤子和双暗-暗孤子的动力学行为。与亮-亮孤子碰撞相比,暗-暗孤子碰撞是弹性的,不同分量的孤子之间没有能量交换。此外,还讨论了暗-暗孤子束缚态,包括静止和运动的束缚态。对于静止的情况,束缚态存在到任意阶,而对于运动的情况,只有两个孤子束缚态是可能的条件下,非线性项的系数具有相反的符号。

英文摘要:

We present a general form of multi-dark soliton solutions of two-dimensional multi-component soliton systems. Multi-dark soliton solutions of the two-dimensional (2D) and one-dimensional (1D) multi-component Yajima-Oikawa (YO) systems, which are often called the 2D and 1D multi-component long wave-short wave resonance interaction systems, are studied in detail. Taking the 2D coupled YO system with two short wave and one long wave components as an example, we derive the general $N$-dark-dark soliton solution in both the Gram type and Wronski type determinant forms for the 2D coupled YO system via the KP hierarchy reduction method. By imposing certain constraint conditions, the general $N$-dark-dark soliton solution of the 1D coupled YO system is further obtained. The dynamics of one dark-dark and two dark-dark solitons are analyzed in detail. In contrast with bright-bright soliton collisions, it is shown that dark-dark soliton collisions are elastic and there is no energy exchange among solitons in different components. Moreover, the dark-dark soliton bound states including the stationary and moving ones are discussed. For the stationary case, the bound states exist up to arbitrary order, whereas, for the moving case, only the two-soliton bound state is possible under the condition that the coefficients of nonlinear terms have opposite signs.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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