PT-invariant generalised non-local nonlinear Schrödinger equation: soliton solutions

IF 1.9 4区 物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY Pramana Pub Date : 2024-10-15 DOI:10.1007/s12043-024-02827-x
Nirmoy Kumar Das, Dhanashri Barman, Ashoke Das, Towhid E Aman
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Abstract

A new generalised non-local nonlinear Schrödinger (NLS) equation is introduced which possesses a Lax pair and is parity–time (PT)-symmetric. Thus, it is confirmed that the generalised non-local NLS equation is integrable. The inverse scattering transform for the generalised non-local NLS equation is developed using a Riemann–Hilbert problem for rapidly decaying initial data and an approach for finding pure soliton solutions is described. The analytical characteristics of the eigenfunctions, scattering data and their symmetries are discussed. Finally, using Mathematica some important two-dimensional plots of the wave solutions are shown to illustrate the dynamics of the model.

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PT 不变的广义非局部非线性薛定谔方程:孤子解
本文引入了一个新的广义非局部非线性薛定谔(NLS)方程,该方程具有拉克斯对和奇偶时(PT)对称性。因此,可以证实广义非局部 NLS 方程是可积分的。利用快速衰减初始数据的黎曼-希尔伯特问题,建立了广义非局部 NLS 方程的反散射变换,并描述了寻找纯孤子解的方法。还讨论了特征函数、散射数据及其对称性的分析特征。最后,使用 Mathematica 展示了一些重要的波解二维图,以说明模型的动态。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Pramana
Pramana 物理-物理:综合
CiteScore
3.60
自引率
7.10%
发文量
206
审稿时长
3 months
期刊介绍: Pramana - Journal of Physics is a monthly research journal in English published by the Indian Academy of Sciences in collaboration with Indian National Science Academy and Indian Physics Association. The journal publishes refereed papers covering current research in Physics, both original contributions - research papers, brief reports or rapid communications - and invited reviews. Pramana also publishes special issues devoted to advances in specific areas of Physics and proceedings of select high quality conferences.
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