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PKU HEP Seminar and Workshop (北京大学高能物理组)

Classical Gravitational Dynamics from Quantum Field Theory & HEFT Numerators from Kinematic Algebra

Asia/Shanghai
B105 (CHEP)

B105

CHEP

Description

Title: Classical Gravitational Dynamics from Quantum Field Theory

Abstract:
High-precision theoretical predictions for the motion of binary black hole and neutron star systems are essential for maximizing the discovery potential of current and future gravitational-wave observations, such as LIGO-Virgo-Kagra, Taiji, TianQin, and Einstein Telescope. In this pursuit, a surprising and powerful toolkit has emerged from Quantum Field Theory methodology. This presentation will delve into how modern analytical methods, including Effective Field Theory and Feynman multi-loop techniques, are revolutionizing our ability to solve the gravitational two-body problem with high analytical precision.

Bio:
刘正文,东南大学物理学院与丘成桐中心教授。2019年于比利时鲁汶大学获博士学位,2019至2022年在德国电子同步加速器国家研究中心(DESY)从事研究工作,2022年加入玻尔研究所担任助理教授,2024年入职东南大学,入选国家海外高层次青年人才项目。近年来,与合作者将量子场论与数学中的现代解析技术系统引入相对论两体动力学研究,取得了一系列具有国际影响力的高精度解析结果。已在国际高水平期刊发表学术论文20余篇,其中5篇出版于Physical Review Letters,并受邀为Nature撰写评述文章。

 

Title: HEFT Numerators from Kinematic Algebra
重质量有效场论(HEFT)运动学分子的运动学代数构造方法

摘要:
The fusion rules constructed from formal Hopf-algebra generators have provided a powerful and efficient method for computing strong-interaction amplitudes, and have recently been adapted to the calculation of effective spacetime metrics in the binary black-hole inspiral problem (arXiv:2111.15649 and 1906.10683). In this talk, we present a string-theoretic explanation for these fusion rules, which allows us to explicitly interpret the resulting kinematic numerators as products of kinematic-algebra structure constants. This formulation also clarifies how these techniques extend to gravitational applications.

在强作用力振幅的研究中,由形式化 Hopf 代数生成元构建的融合规则已成为高效率振幅计算的重要工具之一,并已成功推广应用于引力波观测相关的理论分析工作,特别是在双黑洞绕行系统中有效时空度规高精度修正的计算问题中(arXiv:2111.15649、1906.10683)。在本报告中,我们将从弦论角度对这些融合规则给出解释,从而将由此得到的运动学分子项明确表达为运动学代数结构常数的乘积,并同时阐明此构造向引力领域推广时的内在一致性。(参考工作 arXiv:2501.14523)

报告人简介:
傅致豪研究员毕业于英国杜伦大学(Durham University),曾于斯坦福大学访问,并在浙江大学、台湾交通大学及英国诺丁汉大学从事博士后研究。此后在陕西师范大学及中国科学院大学杭州高等研究院开展研究,现为河南省科学院数学研究所副研究员。

傅致豪研究员的研究方向主要包括规范场论与引力散射振幅、色–运动学对偶、弦论顶点算符代数及相关代数结构,研究成果发表于 Journal of High Energy Physics、Physical Review D、Physics Letters B 等国际期刊;其近期工作也收录于 Springer 出版的专著 Lie Theory and Its Applications in Physics。近年来,他与法国 CEA Saclay 的 Pierre Vanhove 教授合作,从弦论与 Hopf 代数结构出发构建规范场论的运动学分子,为理解场论振幅中的色–运动学对偶提供了新的代数解释。其最新研究涉及 HEFT 振幅的运动学代数构造、单圈 BCJ 结构以及弦论单圈振幅的运动学代数统一描述等课题。

*请线下参加报告的外单位老师、同学注册时填写个人信息(中文姓名、身份证号码及手机号码),用于预约进入物理学院。

Organised by

Prof. Yang Zhang

Registration
Participants