报告题目：Confined spin-kink spectra in quasi-1D antiferromagnets Sr/BaCo2V2O8
报告时间：2026年10月8日（周四）15:30
报告地点：鼓楼校区唐仲英楼 B501
报 告 人：管习⽂研究员,中国科学院精密测量科学与技术创新研究院（APM）
摘 要：Confined spin kinks in quasi‑one‑dimensional (1D) antiferromagnets offer a platform for investigating emergent symmetries, most prominently the integrable E8 quantum field theory. However, it remains unclear to what extent the sharp spectral modes observed in real materials arise from integrable E8 physics or they are governed by microscopic non-integrable confined spin kinks. In this talk, using a projected two-domain-wall description derived from the Ising limit, we analytical calculate the transverse dynamical structure factors and compare them with measured neutron-scattering spectra in the quasi‑1D antiferromagnets SrCo2V2O8 and BaCo2V2O8. The calculation provides a microscopic account of the mixing of confined spin-kink configurations, capturing the measured spectral‑peak positions, mass ratios, and line shapes with good overall agreement for both compounds. While the resulting sharp modes exhibit an E8-like mass hierarchy over a finite magnetic‑field window, partial agreement with E8 mass ratios alone is insufficient to confirm full realization of the integrable massive field theory. Establishing its relation to E8 universality requires agreement beyond selected mass ratios, demanding intra‑ and inter-chain couplings as well as accounting for scattering by long domain walls. The present projected framework provides key spin configurations for these comparisons, with extensions needed to include the omitted higher domain-wall sectors for describing E8-like spectra beyond the integrable limit.
报告人简介：管习⽂, 中国科学院精密测量科学与技术创新研究院（APM）研究员，美国物理学会会⼠。1998 年吉林⼤学博⼠毕业后在德国和巴⻄从事博⼠后研究。2003-2012 期间在澳⼤利亚国⽴⼤学（ANU）物理与⼯程研究院任研究员、⾼级研究员，2012 年 10 ⽉回国在 APM 担任研究员和教授。⾃ 2016 任 ANU 的荣誉教授，也是美国哈佛⼤学、洛斯阿拉莫斯国家实验室等世界⼀流研究机构的⾼级访问学者, 清华⼤学⾼等研究院客座教授，⾹港中⽂⼤学杨振宁访问学⼈。⾃ 2013 年回国来，5 次担任科技部及国家⾃然基⾦重点项⽬⾸席，并获得精密测量研究院 4 次科技突破奖，2022 年获得杰出⼈才奖。2024 年获得湖北省⾃然科学⼀等奖。管习⽂⻓期从事冷原⼦少体和多体物理系统和⾃旋系统的严格解以及精密测量理论的研究，多项理论预⾔得到实验验证。 ⾄今发表 160 余篇 SCI 论⽂，包括《Science》、《Review of Modern Physics》、《Nature》⼦刊、《Report on Progress in Physics》、《Physical Review Letters》等。
直播信息：第111期学术报告会将通过寇享同步直播，直播链接：https://www.koushare.com/live/details/56466
主办：南京大学物理学院、江苏省物理学会、江苏省物理科学研究中心
联系人：雷群利老师，lql@nju.edu.cn
