Organizers

数学物理团队

02

Speaker

Yang Zhou 周洋 (Fudan University)

03

Time

Thur., 13:30-14:30, Mar. 19, 2026

04

Venue

B627, Shuangqing Complex Building A

From Weyl Anomaly to Universal Defect Energy and Entropy

Defects provide a powerful window into strongly coupled quantum systems. In this talk, I will present closed-form results for how surface defects contribute to the energy and entropy in higher-dimensional theories. First, the defect contribution to the twisted Rényi entropy takes a remarkably simple form: it is linear in 1/n, where n is the Rényi index, and is entirely controlled by the defect Weyl-anomaly coefficients. I will also describe an equally compact expression for the defect contribution to the twisted Casimir energy, which reduces to the known formula in a particular limit. These results highlight a precise bridge between defect conformal anomalies and defect observables relevant to entanglement and Casimir energy.

About the speaker:

Research Interests: Theoretic high energy physics. My current interests are non-perturbative aspects of quantum field theory in various dimensions and their applications in particle physics, string theory and condensed matter physics. My recent works include information-theoretic structure of quantum field theory and supersymmetric Rényi entropy/BPS hyperbolic black hole correspondence.

Personal Hompage:

https://phys.fudan.edu.cn/db/86/c7605a121734/page.htm