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arXiv 2409.19233nlin.SInlin.PS
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具有恒定背景的可积交叉耦合非线性薛定谔方程中孤子的碰撞动力学与图样形成

Collisional Dynamics of Solitons and Pattern Formation in an Integrable Cross Coupled Nonlinear Schrodinger equation with constant background

P. S. Vinayagam, D. Aravindha Krishnan, R. V. Kamaleshwaran, R. Radha

AI总结:

本文利用规范变换和达布变换研究具有恒定背景的交叉耦合非线性薛定谔方程,揭示非弹性孤子碰撞、呼吸子及亮暗孤子图样形成,并发现仅调控恒定波场振幅即可获得多种局域激发。

摘要:

我们研究了不同偏振的光脉冲通过具有交叉耦合的凝聚体(称为恒定背景场)传播时产生的动力学,该交叉耦合由耦合非线性薛定谔方程(NLSE)型方程描述。随后,我们采用规范变换和达布变换方法来揭示由背景场和交叉耦合产生的丰富动力学。研究发现亮孤子的碰撞动力学是非弹性的。恒定背景场被发现能够在传播过程中促进光脉冲的周期性局域化。我们还发掘了耦合NLSE的呼吸子、亮-亮、亮-暗和暗-亮孤子。虽然呼吸子的振幅随时间振荡与预测一致,但其最大(或最小)振幅保持恒定,交叉耦合的加入仅导致其振幅在一段时间内出现快速涨落。此外,在恒定波场存在下交叉耦合的增强促进了光脉冲的干涉,从而在亮-亮、亮-暗和暗-亮孤子之间形成有趣的图样。结果的亮点在于,仅通过调控恒定波场的振幅,就可以获得各种局域激发,如呼吸子、亮孤子和暗孤子。

英文摘要:

We investigate the dynamics arising out of the propagation of light pulses with different polarizations through a condensate (referred to as a constant background field) with cross coupling described by a coupled nonlinear Schrodinger equation(NLSE) type equation. We then employ Gauge and Darboux transformation approach to bring out the rich dynamics arising out of the background field and cross coupling. The collisional dynamics of bright solitons is found to be inelastic. The constant background field is found to facilitate the periodic localization of light pulses during propagation. We have also unearthed breathers, bright-bright, bright-dark and dark-bright solitons of the coupled NLSE. While the amplitude of breathers oscillate with time as predicted, their maximum(or minimum) amplitude is found to remain a constant and the addition of cross coupling only contributes to the rapid fluctuations in its amplitude over a period of time. In addition, the reinforcement of cross coupling in the presence of constant wave field facilitates the interference of light pulses leading to interesting pattern formation among bright-bright, bright-dark and dark-bright solitons. The highlight of the results is that one obtains various localized excitations like breathers, bright and dark solitons by simply manipulating the amplitude of the constant wave field.

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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