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

量子场中的相与相变在新物理中的运用:从渐近安全到引力波

by Prof. Zhiwei Wang (University of Electronic Science and Technology of China)

Asia/Shanghai
Description

Phases of quantum field theory (QFT) is a core concept to unify many deep problems in beyond the Standard Model (BSM) new physics. In this talk, I will select two interesting phases: the ultraviolet (UV) conformal phase and the infrared (IR) confinement/deconfinement phase. The UV conformal phase known as asymptotic safety is one of the very few solutions to realize UV completion within the framework of QFT. By using the large number-of-flavour (1/Nf) expansion, the Standard Model achieves an interacting UV fixed point, addressing the famous UV Landau Pole issue. Applying renormalization group flow as a bridge to connect UV fixed point and IR physics provides constraints on the BSM physics.

In the IR, the confinement/deconfinement phase transition offers a unique possibility to generate gravitational wave signature to constrain strongly coupled dark matter. We go beyond the state-of-the-art by combining first principal lattice results and effective field theory approaches as Polyakov Loop model to explore this possibility. We find the future Big Bang Observer and DECIGO experiment have a higher chance to detect the gravitational wave signals.

Bibliography: 
王志伟博士现任电子科技大学研究员,并入选电子科技大学“百人计划”。王博士在加拿大萨斯卡切温大学获得博士学位(2012-2016)。曾于2017年获得加拿大总督学术金牌,为加拿大授予博士期间学术成就的最高荣誉(国家级奖项),并获得University of Saskatchewan全校最佳博士毕业论文,以及Ishwar Gupta物理奖。在获得博士学位之后,王博士任职加拿大滑铁卢大学与丹麦CP3-Origins研究所联合培养博士后(2016-2019)。2019-2021起任职丹麦CP3-Origins研究所博士后研究员。2021-2022任职瑞典Lund大学研究员(高级博士后研究员)。

王志伟博士的研究领域为高能理论物理,研究方向集中在超越标准模型新物理“唯象学”与“理论”的交叉方向。近年来,王博士已经在四个相关领域做出了一系列重要工作,在强耦合暗物质相变引力波,标准模型的渐进安全与紫外完备UV Completion, 动力学对称破缺, 共形对称性下的高圈求和技术等方向都具有一定的代表性工作。完成学术论文27篇,其中在国际权威学术期刊发表论文21篇(包括4篇顶尖期刊Phys.Rev.Lett.均为最主要贡献作者),并有一篇PRL入选Editor Suggestion

Tencent Meeting: 241-871-661
 

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Organised by

Prof. Jia Liu