题 目： Exploring 3d CFTs in the fuzzified world :
Critical gauge theories, conformal defects and boundaries
报告人：Zheng Zhou (周正) Perimeter Institute of Theoretical Physics
时 间： 2025年1月7日（星期二） 下午14:00-16:00
地 点： LE201
邀请人： 张学锋
报告摘要：Conformal field theories have provided invaluable insight into critical phenomena and fundamental structures of QFTs. Meanwhile, many open questions on 3d CFTs bearing theoretical and practical significance remain largely unexplored, such as the properties of various critical gauge theories and conformal defects and boundaries. The fuzzy (non-commutative) sphere has emerged as a powerful method and has shown exceptional efficiency in studying 3d CFTs, bridging them with quantum Hall physics. In this talk, I will introduce a series of findings through the fuzzy sphere, including (1) the conformal symmetry and pseudo-criticality of deconfined criticality, (2) a new series of CFTs with Sp(N) global symmetry closed related to Chern-Simons-matter theories, (3) the magnetic line defect in 3d Ising CFT including its RG-monotonic g-function, and (4) various conformal boundaries in 3d Ising theory. I will also envisage the future of this journey.
报告人介绍：Zheng Zhou (周正) is a doctoral candidate at Perimeter Institute of Theoretical Physics, Canada. He finished his Bachelor study at Fudan University in 2021 and his Master study at Perimeter Institute in 2022. His research mainly focuses on the theoretical and numerical study of exotic critical behaviour in condensed matter systems, especially about conformal field theories, on the setup of fuzzy sphere and lattice models, and with numerical tools like ED, DMRG and QMC.
