时间：9月28日（周日）15:00-16:00

地点：勤园20-518

报告摘要：

We present a single, dimension–independent framework that links four–dimensional duality–invariant nonlinear electrodynamics to two–dimensional integrable sigma models. Both sectors are shown to obey the same first–order Courant–Hilbert equation, solved by a common generating function and an auxiliary–potential formulation. Within this structure, a discrete $\varphi$–parity acts as a selection rule, organizing deformation series into integer versus fractional powers. Two commuting deformations—an irrelevant parameter $\lambda$ and a marginal parameter $\gamma$—admit universal flow representations that recover root–$T\bar T$ dynamics and extend them in a controlled way. The construction yields closed–form families (generalized Born–Infeld, logarithmic, and $q$–deformed) and a new integrable model, all realized in 2D and 4D. These results replace case–by–case analyses with a unified route to solvable nonlinear theories, with immediate relevance to gauge dynamics, string–inspired effective actions, and integrable models.

报告人简介：

  何松，宁波大学基础物理与量子科技研究院教授。研究方向包括引力理论、量子场论、弦论与数学物理，主要致力于通过弦论与场论中的对偶性加深对引力本质的理解，并利用规范/引力对偶方法研究量子场论中的非微扰问题，特别是在量子色动力学（QCD）和强关联凝聚态系统中的应用。