Studying inflationary cosmological correlators using conformal symmetry in momentum space (part 2)

Abstract: During Inflation the universe was approximately described by deSitter (dS) space. The symmetries of a late time slice of 4-dimensional dS space are the same as those of a 3-dimensional Euclidean Conformal Field Theory (CFT). We will discuss how these symmetries may impose important constraints on the correlation functions of cosmological perturbations produced during inflation, which can directly be observed in the CMB. Using these symmetry considerations, we will understand the Ward identities for conformal invariance, written in momentum space, which imposes restrictions on those correlation functions. We will also discuss how we can learn about these correlation functions computed in the alpha vacua of dS space by using CFT techniques in momentum space.

general relativity and quantum cosmologyHEP - theory

Audience: researchers in the topic

Quantum Cosmos Seminars