报告主题：量子多体问题的共形场论方法

主 讲 人：荣俊臣 博士（巴黎综合理工）

主 持 人：李晓光

时 间：2026年6月17日（三）10：00

地 点：致知楼706

嘉宾简介：

荣俊臣，巴黎综合理工博士后。长期从事量子场论相关研究，重点关注共形自举（conformal bootstrap）以及共形场论在凝聚态物理中的引用。曾在德国电子加速器研究所（DESY）、巴黎高等研究院（IHES）、韩国汉阳大学等机构从事博士后研究工作。

报告摘要：

Conformal field theory is the universal language to describe many second-order phase transitions in nature. I will summarize our work on using conformal field theory as a probe to study problems in quantum many-body physics. The topics will consist of three parts:

1, temperature-Resistant Order and reverse spontaneous symmetry: We build a field theory model where a symmetry-breaking phase can persist to arbitrarily high temperature.

2, a novel phase in the quantum loop model: We combine CFT techniques with large-scale Monte Carlo simulations to discover a highly quantum phase of the quantum loop model.

3, conformal interface between two-dimensional CFTs: We construct and solve exactly a conformal interface between the Ising and tri-critical Ising CFT, which may be realized in a Rydberg atom array simulator.