Online Seminar〝Thermodynamics in f(R) theories of gravity with coupling between matter and geometry〞

Star-UBB Seminar Series:- Thermodynamics in f(R) theories of gravity with coupling between matter and geometry

The result of the observational data from the type Ia supernovae indicates that our universe presently experiences an accelerating expansion, usually called the late-time cosmic acceleration. It makes the modern cosmology based on general relativity face troubles. In order to shed some lights on this observational issue, f(R) theories of gravity have been taken into consideration, which is a competitive member in modified theories of gravity due to the simplicity and stability. From the theoretical aspect, the present cosmic accelerating expansion can be explained by f(R) theories of gravity. Besides exploring the cosmic accelerating expansion, f(R) theories of gravity have been used to investigate other cosmological issues, in which thermodynamics is an important one. Recently, considering the coupling between matter and geometry, a more general type of f(R) gravitational model has been proposed. In this talk, the speaker would like to discuss the effect of the coupling between matter and geometry on thermodynamics in f(R) theories of gravity, especially of the first as well as generalized second laws of thermodynamics.

時間:2023.05.18(四) 16:00~17:00
頻道:Zoom ID:853-7454-4159 ←
講者:Jun Wang 王俊 (中国昆明 云南大学 物理与天文学院 副教授)


Scientific and Technological Advanced Research- Babeș-Bolyai University(Star-UBB) Seminar Series in Gravitation, Cosmology and Astrophysics

Presently a period of rapid and intense change are being witnessed in our understanding of the gravitational force, at a rate that is quickly increasing since the important observational discoveries of the late 1990s. With the advent of new observational techniques, the emergence of important cosmological and astrophysical paradigms can be seen that lead to a deep change in our understanding of the Universe. Astronomical observations strongly suggest that at large scales the force of gravity may not behave according to standard general relativity, and that a generalization of the gravitational action, either at the geometric level, or at the matter level, may be required for a full understanding of the gravitational interaction.

The goal of the present seminar is to bring Theoretical Gravitational Physics closer to the observations and experiments, and to discuss current topics in general relativity, high-energy physics, astrophysics and cosmology.


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