Correlation functions, reheating and Standard Model in models of holographic cosmology

• Grant number: 25/06199-0
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: October 01, 2025
• End date: February 28, 2029
• Field of knowledge: Physical Sciences and Mathematics - Physics - Elementary Particle Physics and Fields
• Principal Investigator: Horatiu Stefan Nastase
• Grantee: Juliana Zanatta Finotti
• Host Institution: Instituto de Física Teórica (IFT). Universidade Estadual Paulista (UNESP). Campus de São Paulo. São Paulo , SP, Brazil
• Associated research grant: 19/21281-4 - Gauge / gravity duality, AP.TEM

Abstract

Gauge/gravity duality gives a holographic map between a gravitational theory in a background spacetime and a field theory at the boundary, in which one side is perturbative and the other non-perturbative. Although it has mostly been applied to calculations in field theory, it can be applied to describe a strongly-coupled phase of cosmology, giving "holographic cosmology". A lot of work in the phenomenological version of McFadden and Skenderis has shown that it fits current CMBR data and solves problems as well as $\Lambda-CDM+$inflation. In this thesis, we will first consider non-Gaussianities coming from cosmological 3-point functions calculable in field theory. Next, we will consider the embedding of generic models of cosmological "reheating" into supergravity, and finally of reheating and Standard Model constructions into string theory models, thus hopefully moving into the area of true "top-down" predictions.