Programme

O.3 -- Oral, VCTP-51

Date: Monday, 3 August 2026

Time: 11:50 - 12:10

Which phase of universe is favored by fourth-order gravity models?

Tuan Q. Do

Phenikaa Institute for Advanced Study, Phenikaa University

In this talk, I will present recent results on investigating the stability of de Sitter solution in four novel higher-order gravity models, namely the Einstein-Grisaru-Zanon gravity, Starobinsky-Grisaru-Zanon gravity, generalized Einsteinian cubic gravity, and Starobinsky-generalized Einsteinian cubic gravity. These investigations are an important criterion to determine which phase of universe would be compatible with these fourth-order gravity models. Furthermore, we are able, thanks to the obtained results, to identify potential extensions of the well-known Starobinsky inflationary model that may resolve its tension with the latest Atacama Cosmology Telescope data.

Presenter: Do Quoc Tuan