I will discuss the phase transition on the interface between the 2D Ising CFT and the tricritical Ising CFT, extending Cardy’s classic result on the boundary phase transition of 2D CFTs. I will show that there exists a critical point separating the ordered phase and disordered phase, which can be described by a novel conformal interface between 2D Ising CFT and tricritical Ising CFT. Studying the annulus partition function (thermal CFT on a line interval) allows us to bootstrap the boundary state up to a few signs. This is possible because the interface preserves a W3 symmetry, which emerges at the critical point. The work is inspired by recent advances in the experimental realization of the 2D Ising and tricritical Ising models using Rydberg atom arrays. I will introduce a potential experimental realization of the above setup if time permits.

Biography

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。

Inviter: De-Liang Zhong, Gang Yang