
登录 注册 
浙大论坛 > 活动组织 > 浏览当前帖子  最新帖子进站窗口排行在线会员隐藏左侧栏 
物理学院叶锦武学术报告的通知（School of Physics Colloquium）  
【返回本版】 【发表帖子】 【回复帖子】  浏览量 397 回帖数 0 
凤凰栖梧 等级 ★ 楼主 发表于 2022/10/2 10:09:25 编 辑 

题目：Emergent spacetime meets emergent quantum phenomena 报告人：Jinwu Ye (叶锦武) Mississippi State university/West Lake university 地点： 紫金港西区海纳苑8幢215 时间： 9月30日，周五，15:3016:30 摘要 P.W. Anderson said More is different . It says the macroscopic quantum phenomena such assuperfluids, superconductors, quantum antiferromagnetism, fractional quantum Hall states, etc.emerge as the number of interacting particles gets more and more. However, he left the question how these emergent quantum or topological phenomena change under different inertial frames. In this colloquium, we try to address this outstanding problem. We propose there is an emergent spacetime corresponding to any emergent quantum phenomenon, especially near a quantum/topological phase transition (QPT). We demonstrate this new emergent spacetime structure by studying one of the simplest QPTs: Superfluid (SF)Mott transitions of interacting bosons in a square lattice observed in a frame moving with a constant velocity relative to the underlaying lattice. By constructing effective actions and performing microscopic calculations on a lattice, we find that the new emergent spacetime leads to several new effects in the moving frame such as the change of the ground state (the Mott phase near the QPT may turn into a SF phase, but not the other way around), the rising of the KT transition temperature, the change of the condensation momentum, the sign reverse of the Doppler shift in the excitation spectrum relative to the bare velocity, the emergence of new class of QPTs, etc. Contrast to the Doppler shifts in a relativistic quantum field theory, Unruh effects in an accelerating observer, emergent curved spacetime from the SachdevYeKitaev model are made. Doing various light or neutron scattering measurements in a moving sample may become an effective way not only measure various intrinsic properties of the materials, tune various quantum and topological phases through novel phase transitions, but also probe the new emergent spacetime structure near any QPT. 参考文献: arXiv:2207.10475, arXiv:condmat/0512480 ( substantially revised version on July 15, 2022 ). 个人简介 Jinwu Ye (叶锦武) Mississippi State university/West Lake university Prof. Ye received his Ph.D. from Yale University. Now he is a Professor at Mississippi state university. He has been a longterm visitor at the Institute for Theoretical Sciences, Westlake University since last Fall. He is a condensed matter theorist working on the interdisciplinary field of condensed matter, quantum optics, cold atoms, nonrelativistic quantum field theory and conformal field theory. Recently, he is particularly interested to explore possible deep connections among quantum/topological phases, curved spacetime, quantum black holes from material''s point of views. 
1 
论坛帮助 友情链接 会员认证删帖申请 联系我们 