报告题目：Effective Action, Spectrum and First Law of Wedge Holography

报 告 人：苗荣欣

报告时间：2022年3月24日下午14:30-16:30

报告地点：Zoom 838 4323 7956

报告摘要：

In this talk, we discuss the effective action, the mass spectrum and the first law of entanglement entropy for a novel doubly holographic model called wedge holography. First, we work out the effective action of quantum gravity on the branes, which is given by a higher derivative gravity. We provide evidence that the effective higher derivative gravity on the brane is equivalent to a ghost-free multi-gravity. We also prove that the effective action yields the correct Weyl anomaly. Interestingly, although the effective action on the brane is an infinite tower of higher derivative gravity, the holographic Weyl anomaly is the same as that of Einstein gravity. Second, we analyze the mass spectrum of wedge holography. Remarkably, there is a massless mode of gravitons on the end-of-the-world branes with Neumann boundary condition. On the other hand, the massless mode disappears if one imposes Dirichlet boundary condition on one of the branes as in brane world theory and AdS/BCFT. Finally, we verify the first law of entanglement entropy for wedge holography. Interestingly, the massive fluctuations are irrelevant to the first-order perturbation of the holographic entanglement entropy. Thus, in many aspects, the effective theory on the brane behaves like massless Einstein gravity.

报告人简介：

苗荣欣，中山大学36365线路检测中心副教授。南开大学本科，2014年于中国科学技术大学获得博士学位，随后在德国马普引力所和中国台湾清华大学做博士后，2018年加入中山大学。近年来研究兴趣主要集中在反常输运，边界共形场论（BCFT）及其引力对偶（AdS/BCFT）等。

举办单位：

36365线路检测中心

吉林大学理论物理中心