报告题目：Linking Primordial Physics to Late-Time Observables with Projected Statistics

报 告 人：Zucheng Gao 高祖铖 (Centre national de la recherche scientifique, France)

报告时间：2025年12月22日13：30

报告地点：物理楼W260

内容摘要：The ΛCDM model has provided a remarkably successful framework for understanding cosmic evolution, yet some of the most profound questions in physics remain open: What is the nature of dark matter and dark energy? How were primordial fluctuations generated? And what new high-energy physics might be imprinted on the earliest moments of the Universe?Forthcoming surveys—including DESI, Euclid, SPHEREx, the Simons Observatory, and CMB-S4—will deliver data capable of testing these questions with unprecedented statistical power. Realising this potential requires fast and accurate tools that translate theoretical predictions for the early Universe into the projected observables measured at late times.In this talk, I will present a suite of methods developed to address this challenge. These include an efficient forward-modelling formalism for angular statistics in large-scale structure, and a composed-field technique designed to uncover signatures of parity-violating physics in cosmological data. Together, these tools help bridge the gap between fundamental theory and the rich observational landscape of the next decade.

报告人简介：高祖铖现于法国科学研究中心(CNRS) 从事博士后工作。2024年博士毕业于英国剑桥大学天文系，2020年本科毕业于北京大学物理学院。在2019-2021年分别于加州理工学院，北京大学科维理天文与天体物理研究所从事研究助理工作。目前研究方向为大尺度结构宇宙学，通过理论计算和数值模拟，分析星系巡天(galaxy clustering)，微波背景辐射(CMB)以及谱线强度映射(LIM)中的两点以及高维关联函数，进而研究早期宇宙物理，以及宇宙演化。