非均匀自散焦PT系统中的不对称亮孤子  

Asymmetric bright solitons in PT systems with an inhomogeneous defocusing nonlinearity

作　　者：杜智景 史凯 刘东帅 董亮伟 DU Zhi-jing;SHI Kai;LIU Dong-shuai;DONG Liang-wei(School of Arts and Sciences, Shaanxi University of Science & Technology, Xi′an 710021, China)

机构地区：[1]陕西科技大学文理学院,陕西西安710021

出　　处：《陕西科技大学学报》2022年第3期200-206,共7页Journal of Shaanxi University of Science & Technology

基　　金：陕西省科技厅自然科学基础研究计划项目(2019JM-307)。

摘　　要：发现存在于反对称局域或周期性增益-损耗结合调制非均匀自散焦非线性系统中的一类新型不对称亮孤子.与已报道的宇称-时间(PT)对称孤子不同,新型孤子的实部和虚部都是不对称的.揭示孤子的一些新颖特性,包括不破缺的宇称-时间对称性和孤子分支对的合并.在具有周期性增益-损耗系统中,哪一对孤子分支合并取决于增益-损耗的频率.A novel family of bright solitons are found in inhomogeneous nonlinear systems modulated by an antisymmetric localized/periodic gain and loss.Unlike parity-time(PT)symmetric solitons reported elsewhere,both real and imaginary parts of such solitons are asymmetric.Some unique features including unbreakable parity-time symmetry,mergence of pairs of soliton branches are revealed.In systems with a periodic gain and loss,which pair of soliton branches will merge together is determined by the gain-loss frequency.

关 键 词：不对称孤子 增益-损耗 PT对称 非均匀散焦非线性 

分 类 号：O415.6[理学—理论物理]