Thermodynamics of Vaidya-de Sitter and applications

• Ano de defesa: 2021
• Autor(a) principal: Campos, Thiago de Lima
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: eng
• Instituição de defesa: Biblioteca Digitais de Teses e Dissertações da USP
• Palavras-chave em Português: black-hole thermodynamics; buracos negros primordiais.; Hayward thermodynamics; primordial black holes; Schwarzschild-de Sitter; termodinâmica de buracos negros; termodinâmica de Hayward; Vaidya-de Sitter; Vaidya-de Sitter.
• Link de acesso: https://www.teses.usp.br/teses/disponiveis/43/43134/tde-24012022-120913/

In this project, black holes in an environment of positive cosmological constant will be investigated, emphasizing the thermodynamic characteristics of the system. Specifically, we are interested in the Vaidya-de Sitter solution, which represents a generalization of Schwarzschild-de Sitter with accretion or emission of radiation. A thermodynamic analysis for both spacetimes will be conducted, where the formalism proposed by Hayward et al. will be employed. For this reason, the Hayward black-hole thermodynamics is going to be studied in details. This method is suitable for the investigation of spherically symmetric dynamical geometries which possess trapping horizons. Once the characterization of the relevant spacetimes is performed, the results obtained will be applied in a model of a primordial black hole. A function for the mass parameter is assumed and, then, it is measured how important thermodynamic quantities evolve according to the cosmic time.