Primordial features and non-Gaussianities as probes of the early universe

by Xingang Chen (Harvard University)

Tuesday 23 Nov 2021, 10:00 → 11:00 Asia/Shanghai

TDLI

Abstract

Quantum fluctuations in the primordial universe leave ripples in the spacetime, namely the primordial density perturbations, which eventually seed the large-scale structure of the universe we observe today. In this talk, we introduce properties of these primordial density perturbations that can help address the questions such as: How did the Big Bang start: inflation or bounce?  What can we learn about the details of the inflation model? What can we learn about particle physics at the energy scale as high as that of inflation?

Biography

Xingang received his Ph.D. from Columbia University in 2003 and held postdoc positions in the University of Florida, Cornell University and MIT. He was then a Stephen Hawking Advanced Fellow in the University of Cambridge. Before moving to Harvard University, he was an assistant professor in the University of Texas at Dallas.

Chair

林伟康

Division

Astronomy and Astrophysics

Other information

Video at：

https://vshare.sjtu.edu.cn/open/c76d1bcfdd72f118ba28eef5bf80b5dc