理论物理研讨会——量子纠缠与演生(Workshop on Entanglement and Emergence)

主持人：叶鹏 教授

由于是内部讨论，如果需要参加，请提前发邮件至yepeng5@mail.sysu.edu.cn（叶鹏教授），并明确参加的时间段。

具体安排如下：

27日周四上午10-12点

王华嘉 (加州大学圣巴巴拉分校卡弗里理论物理研究所)

讨论题目：Entanglement, causality and energy conditions in QFTs

摘要：It has become increasingly clear that the key to understanding many fundamental questions in quantum field theories (QFTs) is encoded in the underlying structure of entanglement and causality. In this talk, I will discuss a particular direction along such a line: tracing the quantum information and causality origins of energy conditions in QFTs. In particular, I will discuss two approaches to prove the averaged null energy condition (ANEC), one from entanglement constraint and the other from causality constraint. Furthermore, I will discuss how, by combining both elements and consider causality probed by the entanglement data, one can prove the stronger quantum null energy condition (QNEC).

28日周五上午10-12点

陈静远 (斯坦福大学)

讨论题目：Abelian topological order on lattice with electromagnetic background

摘要：The construction of soluble lattice toy models is an important theoretical approach in the study of strongly interacting topological phases of matter. On the other hand, the primary experimental probe to such systems is via electromagnetic response. Somewhat unsatisfactorily, the current systematic construction of the lattice toy models focuses on braiding statistics and does not admit coupling to an electromagnetic background. Thus there is a mismatch between our theoretical approach and experimental probe. In this talk I introduce how to systematically incorporate electromagnetic response into the soluble lattice toy models, for a large class of abelian topological phases. [Reference: 1902.06756]

28日周五下午2-4点

孙佳睿 (开云手机站官方网站入口)

讨论题目：Topics in quantum entanglement and gravity

摘要：In the first part of this talk, I will review some recent progresses in the study of the entanglement entropy by using the the holographic approach, especially focusing on the relationship between quantum entanglement and gravity, such as the entanglement first law and tensor networks. In the second part, I will introduce our recent proposal to construct the gravitational dynamics from tensor networks.

28日号周五下午8-10点

潘逸文 (中山大学物理学院)

讨论题目：Exact Schur correlation functions from localization

摘要：Schur operators in a 4d N=2 theory form a chiral algebra under OPE. They are counted by the Schur index, and by algebraic consideration it can be identified with the vacuum character of the associated chiral algebra, or as the torus partition function of a suitably defined CFT on T2. In this talk we will start by reviewing this 4d SCFT/2d VOA correspondence, and supersymmetric localization on curved spaces. Then we derive the above identification via localization on S3 x S1. Further more, by generalizing the well-known localization argument, we show that all Schur operators, though being non-BPS, can be localized. The matrix integral of the localized Schur correlation function is given. By introducing surface defects in 4d SCFT, character of non-vacuum module can also be accessed via localization.