EPT Seminar - Hayden Lee, University of Pennsylvania

Speaker: Hayden Lee, University of Pennsylvania


Title: A Hidden Combinatorial Structure in Cosmological Correlators

Abstract: Cosmological correlators contain rich information about quantum fields in the early universe, but their structure is often far from transparent. In this talk, I will describe evidence for a hidden combinatorial structure underlying these observables. For a simple class of correlators, the relevant time integrals satisfy differential equations organized by the singularity structure of the correlator itself. This leads to a finite set of basis functions related by simple combinatorial rules, suggesting that aspects of bulk time evolution are encoded directly in boundary kinematics. I will illustrate this structure in explicit examples and comment on its broader implications for the bootstrap of cosmological correlators.

EPT Zoom link: https://umd.zoom.us/j/98156909829?pwd=HKSCcZchnrAY9ncEKmUoW47Cve7XAJ.1
Meeting ID: 981 5690 9829
Passcode: UMDEPT