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Akram Sadat Sefiedgar

Academic rank: Assistant Professor
ORCID:
Education: PhD.
ScopusId:
Faculty: Science
Address:
Phone: 01135302435

Research

Title
Thermodynamics of the FRW Universe at the Event Horizon in Palatini f(R) Gravity
Type
JournalPaper
Keywords
Palatini f(R) gravity, FRW universe, Thermodynamics
Year
2018
Journal Advances in High Energy Physics
DOI
Researchers Akram Sadat Sefiedgar ، Mandana Mirzazadeh Shirvani

Abstract

In an accelerated expanding universe, one can expect the existence of an event horizon. It may be interesting to study the thermodynamics of the Friedmann-Robertson-Walker (FRW) universe at the event horizon. Considering the usual Hawking temperature, the first law of thermodynamics does not hold on the event horizon. To satisfy the first law of thermodynamics, it is necessary to redefine Hawking temperature. In this paper, using the redefinition of Hawking temperature and applying the first law of thermodynamics on the event horizon, the Friedmann equations are obtained in f(R) gravity from the viewpoint of Palatini formalism. In addition, the generalized second law (GSL) of thermodynamics, as a measure of the validity of the theory, is investigated.