4.16-4.20 学术活动预告
2018/4/16 17:15:39 中科院理论物理所
Title
Neural Network Renormalization Group
Speaker
王磊
Affiliation
中国科学院物理研究所
Date & Venue
4月17日(星期二)12:00
ITP Main Building Conference Room322
Abstract
The talk will be a blender of deep learning, variational inference, Monte Carlo, Tensor Networks and other fun stuff.
Title
5-brane webs for 5d N=1 G2 theories
Speaker
Prof. Sung-Soo Kim
Affiliation
University of Electronic Science and Technology of China
Date & Venue
4月18日(周三)14:30
ITP new Building Conference Room6420
Abstract
5d superconformal field theories (SCFTs) have various string constructions, one of which is type IIB (p,q) 5-brane web, and the 5-brane web is a useful tool to study qualitative and quantitative aspects of 5d SCFTs. We discuss 5d N=1 theories of gauge groups SO(N) and Sp(N) which can be constructed using 5-brane webs with an O5-plane. In this talk, we propose topological vertex formalism with an O5-plane, which enables one to compute the Nekrasov partition functions for 5d theories of gauge groups SO(N) and Sp(N). As an example, we apply the formalism to 5d Sp(1) gauge theory with Nf=0 and 8 flavors. We further explore 5d brane constructions for 5d G2 gauge theories through the Higgsing of SO(7) gauge theory with a hypermultiplet in the spinor representation, and then compute their partition functions based on 5-brane webs, by utilizing the topological vertex method with an O5-plane.
Title
冷冻电镜病毒三维重构研究
Speaker
刘红荣教授
Affiliation
湖南师范大学
Date & Venue
4月19日( 周四) 10:30
ITP main Building Conference Room322
Abstract
近年来冷冻电镜技术取得了质的飞跃，病毒三维重构在推动该技术的发展过程中起到了至关重要的作用。多数病毒颗粒由二十面体对称的衣壳和内部非二十面体对称的基因组及大量相关蛋白(对称失配结构)组成。病毒颗粒的高对称性促进了其三维重构分辨率的提高，然而对称失配及超大尺度又极大地限制了其结构研究。本次汇报将介绍我们在冷冻电镜病毒近原子分辨三维重构、二十面体病毒对称失配三维重构及超大尺度病毒颗粒重构等方面所做的工作。
中国科学院理论物理研究所
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