报告题目:On universality of the diffusion bounds in holographic systems

报告人：李伟佳

报告时间：2021年4月13日（周二）14:30

报告地点：理学楼二楼师生活动中心

摘要 (Abstract): One of the most remarkable achievements of the holographic duality is the discovery of the so-called Kovtun- Son-Starintes(KSS) viscosity bound. Despite its validity regime has been checked in a large class of strongly coupled systems with translational invariance, the violation of the bound was later widely revealed in presence of broken translations or rotations.  After that more general bounds on diffusivities were proposed to replace the KSS one. In this talk, I will introduce in detail how to identify the characteristic velocities and timescales for bounding the diffusivities and verify the robustness of the conjectured bounds in holographic systems.

报告人简介(Bio) : 李伟佳，2014年北京师范大学理论物理专业博士。2012-2014年公派美国麻省理工学院和哈佛大学联合培养。2014-2016年希腊克里特大学博士后，合作导师：Elias Kiritsis。回国后任大连理工大学物理学院副教授。主要研究方向为广义相对论和全息引力对偶在凝聚态物理中的应用等。

邀   请   人  ：朱涛 教授