报告题目：Solid physics via a gravitational lens

报  告 人：李伟佳 副教授，大连理工大学

研究方向：广义相对论、量子场论

报告时间：2024年10月10日（星期四）下午16:00

报告地点：量子楼410报告厅

报告摘要：

Holographic axion models are a class of bottom-up models characterized by one or several sets of shift-symmetric axion fields, whose profiles are taken to be linear in the spatial coordinates. These simple models can implement the breaking of translational invariance in the dual field theory while retaining the homogeneity of the background geometry, thus allowing for controllable and fast computations. Therefore, they have very broad applications in gauge/gravity duality.

In this talk, I will present the new progress of the axion models for modeling the elastic properties and collective excitations of solid systems at finite temperatures. Especially, I will show how these models can provide insights into the mechanical failure of solids under shear strains. In addition, I will also discuss the physical nature of the collective modes and propose an extension of the model by incorporating additional sets of axions to describe superlattice systems.

报告人简介：

李伟佳，大连理工大学物理学院副教授、博士生导师。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。2016年起在大连理工大学物理学院任教。研究涉及广义相对论、量子场论、规范/引力对偶以及黑洞物理等交叉领域。近期的主要兴趣点是通过规范/引力对偶、量子场论以及流体力学等跨领域理论工具探索强关联凝聚态、低能QCD等新奇量子多体系统的普适物理性质和行为。