报告题目：Magnetic holographic QCD phase diagram and induced gravitational wave

报  告 人：何松 教授，吉林大学

研究方向：引力理论、弦理论和量子场论

报告时间：2024年4月2日（星期二）上午10:00

报告地点：量子楼410报告厅

报告摘要：

Locating the critical endpoint of QCD and the region of a first-order transition at finite baryon chemical potential is an active research area for QCD matter. We provide a gravitational dual description of QCD matter at finite baryon chemical potential $\mu_B$ and finite temperature using the non-perturbative approach from gauge/gravity duality. After fixing all model parameters using state-of-the-art lattice QCD data at a zero chemical potential, the predicted equation of states and QCD trace anomaly relation are in quantitative agreement with the latest lattice results available. We then give the exact location of the critical endpoint and the first-order transition line that upcoming experiments and measurements can probe. Moreover, using the data from our model at finite $\mu_B$, we calculate the spectrum of the stochastic gravitational wave background associated with the first-order QCD transition in the early universe, which could be observable via pulsar timing in the future. Finally, we further study the phase transition in the pure gluon system and how the rotation effect changes the locus of the critical end point in the pure gluon and 2+1 flavor QCD system. Further, we apply machine learning to build up a magenetic holographic QCD phase diagram and extract the precise location of critical endpoint and characteristic critical behaviors.

报告人简介：

何松, 吉林大学教授，博士生导师。 2011年中科院高能所理论物理博士，2011年-2013年中科院理论物理研究所博士后，2013年-2019年分别在日本京都大学汤川研究所作为JSPS fellow从事博士后研究，在德国马普引力研究所（爱因斯坦研究所）从事博士后研究, 2019年加入吉林大学物理星空官方网站(中国)股份有限公司。近年来的研究兴趣主要集中在弦理论和量子场论中的量子纠缠，AdS/CFT对偶，及其在强耦合系统（量子色动力学和凝聚态物理）中应用。