报告题目：Localized wave solutions on periodic background and magnetization reversal phenomenon for the (2+1)-dimensional Heisenberg ferromagnet spin equation

主讲人：闻小永 教授（北京信息科技大学）

报告时间：2024年06月01日下午14:00-14:40

报告地点：腾讯会议 482-469-822

报告摘要：Heisenberg ferromagnet (HF) spin equation can describe the magnetization motion and the magnetic dynamics of ferromagnetic material. In this talk, we investigate the (2+1)-dimensional Heisenberg ferromagnet spin equation. Based on its known Lax pair, we construct the iterative generalized (𝑟, 𝑁−𝑟)-fold Darboux transformation (DT) to give abundant localized wave solutions on periodic background for this (2 + 1)- dimensional HF equation. In particular, along with the increase of 𝑁 in the DT, we find the reversal phenomenon of the lump and periodic wave structures with respect to the background. Moreover, we also study the magnetization trajectory and magnetization on the Bloch sphere of different kinds of localized waves.

个人简历：闻小永，博士(后)，教授，硕士生导师, 入选2017年北京信息科技大学“勤信拔尖人才”和2023年度全球前2%顶尖科学家榜单。主要从事可积系统理论及应用和计算机符号计算与非线性波动力学方面的研究，在Phys. Rev. E, Chaos, J. Math. Phys., Physica D, Proc. Roy. Soc. A, Commun. Nonlinear. Sci. Numer. Simulat., Appl. Math. Lett., Nonlinear Dyn., Chaos Soliton Fract., Chin. Phys. B等国内外数学物理期刊上发表SCI论文100余篇。主持国家自然科学基金面上项目1项和北京自然科学基金项目3项，参与多项国家自然科学基金和北京自然科学基金项目。