报告人：许坤 博士后（中国科学院大学）

时 间：2024年1月25日（周四）下午14:30

地 点：大学物理实验中心229会议室

摘要：

夸克物质在极端环境中会呈现什么样的性质呢？在这个报告中，我将介绍高能核物理近些年的研究热点，然后汇报我做的三个工作。第一个是在相对论性重离子对撞中，利用重子数扰动高阶矩寻找QCD相变的临界终点（CEP），以及在低能对撞中可能出现的核子物质的气液相变；第二个是研究手征相变以及π介子和ρ介子的质量随着磁场的变化；第三个是研究了相对论重离子对撞中出现的超子自旋极化现象，以及通过自旋密度涨落解释φ介子和K^{ *0}介子的自旋对齐现象。

另外，作为一个科普爱好者，在过去的几年中，我在线上创作了几百篇的图文和视频，以及参与了多次线下科普活动，今年获得了知乎【灯塔计划】计划100万的资助，用于科普创作。在本报告中，我也将汇报我在过去几年参与的科普创作与活动，并分享做科普的一点心得与感想。

简历：

2016年-2021年，中科院高能所理论室，博士；

2021年-2024年，国科大核学院，博士后。

联系方式：ygyao@bit.edu.cn

邀请人： 姚裕贵 教授

网 址：http://physics.bit.edu.cn/

承办单位：物理学院、先进光电量子结构设计与测量教育部重点实验室

*Reporter： Kun Xu

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*Abstract:

What properties does quark matter exhibit in extreme environments? In this report, I will introduce the hot topics in high-energy nuclear physics in recent years, and then report on three works I have done. The first is to find the Critical End Point (CEP) of the QCD phase transition by using the higher moments of baryon number fluctuations in relativistic heavy-ion collisions, as well as the gas-liquid phase transition of nuclear matter that may occur in low-energy collisions; the second is to study chiral phase transitions and the mass changes of π mesons and ρ mesons under magnetic fields; the third is to investigate the hyperon spin polarization phenomenon in relativistic heavy-ion collisions, and explain the spin alignment of φ mesons and K*0 mesons through spin density fluctuations.

Moreover, as a science popularization enthusiast, over the past few years, I have created hundreds of articles and videos online, as well as participated in numerous offline science popularization events. This year, I received one million in funding from Zhihu's [灯塔计划] for science popularization creation. In this report, I will also report on the science popularization creation and activities I have participated in over the past few years and share some thoughts and feelings about doing science popularization.

*Profile：

2016-2021, Division of Theoretical Physics, Institute of High Energy Physics, Ph.D;

2021-2024, School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Postdoctor