(2023-06-07) Seminar: Jia-ju Zhang (张甲举) -- Emergence and breakdown of semiclassical picture in quasiparticle excited states

发布者:杨璐发布时间:2023-06-02浏览次数:124

张甲举 副教授学术报告

Title: Emergence and breakdown of semiclassical picture in quasiparticle excited states

Speaker: Assoc. Prof. Jia-ju Zhang (张甲举)

Affiliation: Tianjin University(天津大学)

Time: 14:00-15:00, Wednesday, 7th June, 2023 (UTC+8, Beijing Time)

Venue: Room 1502, Yifu Architecture Building, Sipailou Campus of Southeast University, Nanjing

   (东南大学四牌楼校区逸夫建筑馆丘成桐中心1502室)

Inviter: Jianfei Xu (许剑飞)


Abstract  

Quasiparticles are collective modes in many-body systems that can mimic semiclassical particles under some circumstances. I will talk about the emergence of semiclassical features in quasiparticle states of quantum spin chains using two quantum information quantities, entanglement entropy and subsystem distance.  I will also demonstrate how the semiclassical description fails for a different measure, Shannon entropy.


Speaker

张甲举,现任天津大学量子交叉研究中心英才副教授。2009年于山东师范大学获物理学学士学位,2014年于北京大学获理论物理博士学位,随后分别在中国科学院高能物理研究所、意大利米兰比可卡大学和意大利国际高等研究院(SISSA)任博士后研究员,202011月加入天津大学。研究方向为引力理论、量子场论、AdS/CFT对应、统计物理;二维共形场论与一维自旋链中的量子纠缠。


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