arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0904.0327nlin.PS
收藏

具有五阶非线性的衍射扩散Ginzburg-Landau方程中二维孤子间的相互作用

Interactions between two-dimensional solitons in the diffractive-diffusive Ginzburg-Landau equation with the cubic-quintic nonlinearity

George Wainblat, Boris A. Malomed

摘要:

本文报道了具有增益和损失项的二阶-五阶(CQ)组合的二维(2D)复Ginzburg-Landau方程(CGLE)中两个和三个稳定耗散孤子之间碰撞的系统数值分析结果。该方程可以被实现为激光腔的模型,该激光腔包括空间衍射、反常群速度色散(GVD)以及在时间方向上起作用的光谱滤波。由于沿空间轴的伽利略不变性,孤子之间的碰撞是可能的。通过改变GVD系数D和碰撞“速度”(实际上,它是孤子轨迹的空间斜率)来识别碰撞的结果。在低速时,两个或三个同相孤子合并成一个孤立孤子。在较大的速度下,同相孤子对和符号相反的孤子对都将进入离域混沌状态。在更大的速度下,所有的碰撞都变成准弹性的。一个新的结果是揭示了慢孤子之间的碰撞相反的迹象:他们自陷到持续摆动偶极子,这是发现在两个修改(水平在较小的D,和垂直的,如果D是较大的(水平的类似于“之字形”的束缚态的两个孤子中已知的一维CGL方程的CQ型)。研究了孤子在有限失配情况下的碰撞问题。

英文摘要:

We report results of systematic numerical analysis of collisions between two and three stable dissipative solitons in the two-dimensional (2D) complex Ginzburg- Landau equation (CGLE) with the cubic-quintic (CQ) combination of gain and loss terms. The equation may be realized as a model of a laser cavity which includes the spatial diffraction, together with the anomalous group-velocity dispersion (GVD) and spectral filtering acting in the temporal direction. Collisions between solitons are possible due to the Galilean invariance along the spatial axis. Outcomes of the collisions are identified by varying the GVD coefficient, D, and the collision "velocity" (actually, it is the spatial slope of the soliton's trajectory). At small velocities, two or three in-phase solitons merge into a single standing one. At larger velocities, both in-phase soliton pairs and pairs of solitons with opposite signs suffer a transition into a delocalized chaotic state. At still larger velocities, all collisions become quasi-elastic. A new outcome is revealed by collisions between slow solitons with opposite signs: they self-trap into persistent wobbling dipoles, which are found in two modifications (horizontal at smaller D, and vertical if D is larger (the horizontal ones resemble "zigzag" bound states of two solitons known in the 1D CGL equation of the CQ type). Collisions between solitons with a finite mismatch between their trajectories are studied too.

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。

↑