Speaker
Description
Cosmological correlation functions are fundamental observables in early universe cosmology and offer a remarkable window into the fundamental laws that governed the Universe’s earliest moments. In this talk, the speaker will derive a correlator-to-correlator factorisation formula under mild assumptions, establishing a profound relationship between different observables in the context of primordial cosmology. As a concrete example, he will show that, in the minimal model of inflation that violates parity through a gravitational Chern-Simons term, the resulting parity-odd curvature trispectrum is a simple “double copy” of curvature–graviton mixed bispectra. This provides the first explicit example of a cosmological cutting rule that can be directly tested by future observations.
