报告题目：From particles to strings: an introduction to quantum field theory

报 告 人：齐 飞 副教授（中山大学）

报告时间：11月3日周一上午10:30-11:30

报告地点：龙洞校区行政楼610会议室

报告摘要: The traditional method of studying particle physics is to write down the Lagrangian of a system, use the path integral method to deduce the Feynman rules, then use Feynman diagrams to calculate the scattering amplitudes, finally, compare with the calculated scattering amplitudes with the results of generated by the collider. However, experiments found that aside from the well-understood subatomic particles in the standard model, there might exist many more beyond. Even if we restrict to the standard model, the Lagrangian is enormously complicated. String theory arises as a possible solution. Particles are complexified from a zero-dimensional point to a one-dimensional string. Different types of particles are unified as different vibration states of a string. The quantum field theory is built upon this interpretation for computing the scattering amplitudes. In this talk, I will discuss Atiyah and Segal's mathematical axiomatization of quantum field theory and the role of vertex algebras and their representation theory in the study.

报告人简介：齐飞，2018年于罗格斯大学获得博士学位，毕业后先后在耶鲁大学、曼尼托巴大学和丹佛大学进行博士后研究，现在中山大学数学学院（珠海）任副教授职位。主要从事顶点代数、表示论和数学物理研究，论文发表在Comm. Math. Phys., Lett. Math. Phys. 和Trans. Amer. Math. Soc.等杂志上。