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本报告将介绍国际暗能量研究的最新进展，介绍暗能量理论模型，特别是描述状态方程越过 宇宙学常数线的Quintom 理论的发展历史和研究现状; 介绍我国阿里原初引力波探测实验（AliCPT）的现状和下一步规划及预期科学目标; 介绍AliCPT 探测暗能量动力学机制的可能性。

报告人简介

张新民 研究员，阿里原初引力波探测实验首席科学家/AliCPT国际合作组发言人。1991年美国洛杉矶加州大学（UCLA）研究生毕业获博士学位，1996年回国在高能所工作至今。1997年入选中国科学院百人计划，1999年获国家“杰出青年”基金资助，2004年当选《新世纪百千万人才工程国家级人选》。2021年被聘为科技部国家重点研发计划“引力波探测”重点专项实施方案编制专家组专家、总体专家组副组长。主要研究领域为粒子宇宙学。2004年提出 Quintom 暗能量理论，预言暗能量状态方程在宇宙演化过程中越过宇宙学常数限；2006年，带领团队首次分析测量了CMB极化的旋转角；2014年提出阿里原初引力波探测计划。

Xinmin Zhang, Professor of physics, PI of AliCPT  (Ali CMB Polarization Telescope). He received his Ph.D. from UCLA in 1991 and joined the Institute of High Energy Physics,  CAS in 1996. His research primarily focuses on particle cosmology. He was awarded the  “Hundred Talents Program” of the Chinese Academy of Sciences in 1997 and the National Science Foundation for Distinguished Young Scholars award in 1999. In 2004, together with his students, he proposed the Quintom dark energy theory, which predicts that the equation of state of dark energy varies over time and crosses the cosmological constant boundary during its evolution. In 2006, he and his team analyzed and measured the CMB polarization rotation angle for the first time. Currently, he leads the AliCPT project, which aims to construct a CMB telescope in Tibet to search for primordial gravitational waves.

Host: Cheng Zhao