Banca de DEFESA: GESIEL RODRIGUES DA SILVA NETO

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : GESIEL RODRIGUES DA SILVA NETO
DATE: 18/11/2022
TIME: 14:00
LOCAL: online
TITLE:

Spherically symmetric solutions and inflation in higher-derivative theories of gravity

KEY WORDS:

Higher-order gravities. Spherically symmetric solutions. Cosmic Inflation

PAGES: 200
BIG AREA: Ciências Exatas e da Terra
AREA: Física
SUMMARY:

Extensions of general relativity in which higher-order curvature corrections are included in Einstein-Hilbert's action have received increasing attention mainly by model building in high-energy physics --- string theory and quantum gravity --- and in the accelerated expansion of the very early universe. In this PhD thesis, we proposed a higher-order gravity, characterized by the inclusion of all correction terms up to the second-order involving the Ricci scalar. From then on, we approached two topics of interest. The first topic concerns the investigation of spherically symmetric solutions, where we explored weak-field regime and black hole solutions. We obtained all solutions in the weak-field regime and also addressed the issue of the possibility of existence of non-Schwarzschild black hole solutions. In turn, the second topic involves research in the context of cosmic inflation, motivated by the success of the Starobinsky model. In this sense, we developed a detailed research of Starobinsky+$R^{3}$ and Starobinsky+$R^{3}+R\square R$ inflationary models, confronting them with the most recent observational data from the Planck satellite and the BICEP3/Keck Array.

COMMITTEE MEMBERS:
Externo ao Programa - 2196137 - EMANUELE ORAZI - nullExterno à Instituição - ILYA LVOVICH SHAPIRO
Externo à Instituição - JAILSON SOUZA DE ALCANIZ - ON/MCT
Presidente - 1674079 - LEO GOUVEA MEDEIROS
Interno - 1672854 - RAIMUNDO SILVA JUNIOR