New Developments in Theoretical Cosmology

Session

Morning session 1

12 Feb 2025, 10:00

Imperial College London

Conveners

Morning session 1: Damian Galante

• Tarek Anous

Morning session 1: David Stefanyszyn

• Tarek Anous

4. Holography in the static patch

Damian Galante (KCL)

12/02/2025, 10:00

In this talk I will review recent progress towards formulating a holographic theory for the de Sitter static patch, from the point of view of an inertial observer. One of the main obstructions to achieve this is the lack of an asymptotic timelike boundary. I will discuss two ways of, at least partially, overcoming this issue. One way is to consider gravity in the presence of a finite boundary....

9. Cosmological Correlators Through the Looking Glass

David Stefanyszyn (University of Nottingham)

12/02/2025, 11:15

I will discuss parity violation in the early universe. I’ll outline a no-go theorem that states that vanilla inflation cannot produce parity-violating inflationary correlators, then show how including additional massive states in the early universe can yield non-zero signals that take an intriguing factorised form. For example, the parity odd four-point function of scalar perturbations can be...