报告人：Vladimir V. Konotop （葡萄牙里斯本大学 教授）
主持人：黄国翔 教授
时间：12月6日（周一）下午17: 00-18: 00
地点：线下会议地址：光学大楼A508会议室；线上会议地址：腾讯会议199-920-981
报告摘要：
We introduce a continuous one-dimensional non-Hermitian matrix gauge potential and study its effect on dynamics of a two-component field. The model is emulated by a system of evanescently coupled nonlinear waveguides with distributed gain and losses. The considered gauge fields lead to a variety of unusual physical phenomena in both linear and nonlinear regimes. In the linear regime, the field may undergo superexponential convective amplification. A total power of an input Gaussian beam may exhibit a finite-distance blowup, which manifests itself in absolute delocalization of the beam at a finite propagation distance, where the amplitude of the field remains finite. The defocusing Kerr nonlinearity initially enhances superexponential amplification, while at larger distances it suppresses the growth of the total power. The focusing nonlinearity at small distances slows down the power growth and eventually leads to the development of the modulational instability. Complex periodic gauge fields lead to the formation of families of stable fundamental and dipole solitons.
报告人简介：
弗拉基米尔·科诺托普（Valdimir Konotop）是里斯本大学（葡萄牙）物理系教授、物理系主任。他于1982毕业于乌克兰哈尔科夫大学物理系，获硕士学位；1986年获博士学位。1993年成为马德拉大学（葡萄牙）副教授；1999年开始任里斯本大学（葡萄牙）物理系副教授、教授。目前他已在物理学主流刊物上发表论文130多篇，包括近二十篇Physics Review Letters（IF 9.161），并在物理学顶尖期刊如Reviews of Modern Physics (IF 36.367)，Progress in Physics (IF 14.257)发表了多篇Review性质的文章。是非线性光学和凝聚态物理领域内非常著名的专家和具有重要影响力的学者。