共查询到18条相似文献,搜索用时 46 毫秒
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由loop代数的一个子代数出发,构造了一个线性等谱问题,再利用屠格式计算出了一类Liouvelle意义下的可积系统及其双Hamilton结构,作为该可积系统的约化,得到了著名的Schrdinger方程和mKdV方程,因此称该系统为S-mKdV方程族.根据已构造的的子代数,又构造了维数为5的loop代数的一个新的子代数,由此出发设计了一个线性等谱形式,再利用屠格式求得了S-mKdV方程族的一类扩展可积模型.利用这种方法还可以求BPT方程族、TB方程族等谱系的扩展可积模型.因此本方法具有普遍应用价值.最后作为特例,求得了著名的Schrdinger方程和mKdV方程的可积耦合系统. 相似文献
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对已知的Lie代数An-1作直接推广得到一类新的Lie代数gl(n,C).为应用方便,本文只考虑Lie代数gl(3,C)情形.构造了gl(3,C)的一个子代数,通过对阶数的规定,得到了一类新的loop代数.作为其应用,设计了一个新的等谱问题,得到了一个新的Lax对.利用屠格式获得了一族新的可积系统,具有双Hamilton结构,且是Liouville可积系.作为该方程族的约化情形,得到了新的耦合广义Schrdinger方程.
关键词:
Lie代数
可积系
Hamilton结构 相似文献
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从可积模型的双线性形式出发,可以得到关于方程场变量或某种势所存在的所有方向都是指数局域的dromion解或除一个方向外指数衰减的“Solitoff”解.以(1+1)维和(2+1)维KdV类型方程为例,对孤子(dromions或“Solitoff”)间的相互作用进行了详细的研究,发现孤子间的相互作用规律与方程的维数和类型无关.只要方程的多孤子解形式符合Hirota标准形式(所有耦合系数均不为零),孤子之间的碰撞是弹性的,否则就是非弹性的
关键词:
可积模型
孤子相互作用
双线性方法 相似文献
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利用双参数假设给出了一类非线性耦合方程的若干孤子解公式,使物理上许多著名的方程作为该方程的特殊情形得到相应的孤子解,指正了一些文献的错误.
关键词:
非线性发展方程
双参数假设
孤子解 相似文献
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本文构造了耦合自散焦饱和非线性薛定谔方程,通过改变势函数参数再利用功率守恒的平方算符法,得到偶极-偶极、三极-偶极以及偶极-三极矢量孤子解.随着孤子功率的增大,这3类矢量孤子均能存在,它们的存在性明显受到势函数的调制.本文给出了3类矢量孤子由势函数调制的存在区域.3类矢量孤子的稳定区域受每个分量的孤子功率调制.随着两分量孤子功率的增大,3类矢量孤子的稳定域均逐渐扩大.当饱和非线性强度增大时,三极-偶极和偶极-三极矢量孤子由稳定状态到不稳定状态临界点对应的孤子功率值逐渐降低.而偶极-偶极矢量孤子由稳定状态到不稳定状态临界点对应的孤子功率值并不会因为饱和非线性强度增大而变化. 相似文献
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A kind of integrable couplings of soliton equations hierarchy with self-consistent sources associated with sl(4) is presented by Yu. Based on this method, we construct a new integrable couplings of the classical-Boussinesq hierarchy with self-consistent sources by using of loop algebra sl(4). In this paper, we also point out that there exist some errors in Yu's paper and have corrected these errors and set up new formula. The method can be generalized other soliton hierarchy with self-consistent sources. 相似文献
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In this paper, a new nonlinear integrable coupling system of the soliton hierarchy is presented. From the Lax pairs, the coupled KdV equations are constructed successfully. Based on the prolongation method of Wahlquist and Estabrook, we study the prolongation structure of the nonlinear integrable couplings of the KdV equation. 相似文献
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In this paper, a new nonlinear integrable coupling system of the soliton hierarchy is presented. From the Lax pairs, the coupled KdV equations are constructed successfully. Based on the prolongation method of Wahlquist and Estabrook, we study the prolongation structure of the nonlinear integrable couplings of the KdV equation. 相似文献
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Based on a subalgebra G of Lie algebra A2, a new Lie algebra G∗ is constructed. By making use of the Tu scheme, the generalized nonlinear Schrödinger hierarchy and its integrable coupling are both obtained with the help of their corresponding special loop algebras. At last, by means of the quadratic-form identity, their bi-Hamiltonian structures of the generalized nonlinear Schrödinger hierarchy and its integrable coupling system are worked out respectively. The approach presented in this Letter can be used in other integrable hierarchies. 相似文献
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An anti-symmetric loop algebra \overline{A}_2 is constructed. It follows that an integrable system is obtained by use of Tu's scheme. The eminent feature of this integrable system is that it is reduced to a generalized Schr?dinger equation, the well-known heat-conduction equation and a Gerdjkov-Ivanov (GI) equation. Therefore, we call it a generalized SHGI hierarchy. Next, a new high-dimensional subalgebra \tilde{G} of the loop algebra ?_2 is constructed. As its application, a new expanding integrable system with six potential functions is engendered. 相似文献
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This paper is devoted to the study of the underlying linearities of the coupled
Harry--Dym (cHD) soliton hierarchy, including the well-known cHD equation. Resorting
to the nonlinearization of Lax pairs, a family of finite-dimensional Hamiltonian
systems associated with soliton equations are presented, constituting the
decomposition of the cHD soliton hierarchy. After suitably introducing the
Abel--Jacobi coordinates on a Riemann surface, the cHD soliton hierarchy can be
ultimately reduced to linear superpositions,
expressed by the Abel--Jacobi variables. 相似文献
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A new multi-component integrable coupling system for AKNS equation hierarchy with sixteen-potential functions 下载免费PDF全文
It is shown in this paper that the upper triangular strip matrix of
Lie algebra can be used to construct a new integrable coupling
system of soliton equation hierarchy. A direct application to the
Ablowitz--Kaup--Newell-- Segur(AKNS) spectral problem leads to a
novel multi-component soliton equation hierarchy of an integrable
coupling system with sixteen-potential functions. It is indicated
that the study of integrable couplings when using the upper triangular
strip matrix of Lie algebra is an efficient and straightforward
method. 相似文献
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The multi-component Tu hierarchy of soliton equations and its multi-component integrable couplings system 总被引:3,自引:0,他引:3 下载免费PDF全文
A new simple loop algebra GM is constructed, which is devoted to the establishing of an isospectral problem. By making use of the Tu scheme, the multi-component Tu hierarchy is obtained.Furthermore, an expanding loop algebra FM of the loop algebra GM is presented. Based on the FM, the multi-component integrable coupling system of the multi-component Tu hierarchy has been worked out. The method can be applied to other nonlinear evolution equation hierarchies. 相似文献
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Fajun Yu 《Physics letters. A》2011,375(13):1504-1509
Some integrable coupling systems of existing papers are linear integrable couplings. In the Letter, beginning with Lax pairs from special non-semisimple matrix Lie algebras, we establish a scheme for constructing real nonlinear integrable couplings of continuous soliton hierarchy. A direct application to the AKNS spectral problem leads to a novel nonlinear integrable couplings, then we consider the Hamiltonian structures of nonlinear integrable couplings of AKNS hierarchy with the component-trace identity. 相似文献