Inflation correlators encode ultra-high-energy physics at the inflation scale and are promising targets for future cosmological observations. Theory-wise, inflation correlators can be seen as boundary correlators of bulk QFTs in dS. It is thus useful to have analytical controls over these objects for both theoretical and observational purposes. However, the analytical computation of inflation correlators with massive exchanges is notoriously difficult, and significant progress has been made only in recent years. In this talk, I shall introduce the recent progress in analytical computations of inflation correlators, and highlight a class of processes with boost-breaking chemical potentials. I shall also describe the techniques used in our previous and ongoing works, including the partial Mellin-Barnes representation, the bootstrap equations, and the spectral decomposition.  

个人简介：Zhong-Zhi Xianyu is an assistant professor at the Department of Physics, Tsinghua University. He obtained his Ph.D. in 2015 from Tsinghua and was a postdoc at Harvard from 2015 to 2020. He works mainly in theoretical particle physics and cosmology. His recent research interests include cosmological collider physics, QFT in dS spacetime, new physics in cosmology and astrophysics, gravitational wave astronomy, etc.