Online Seminar “Semi-Symmetric Metric Gravity- from the Friedmann-Schouten geometry with torsion to dynamical dark energy models”

Star-UBB Seminar Series:- Semi-Symmetric Metric Gravity- from the Friedmann-Schouten geometry with torsion to dynamical dark energy models

In this talk, the speaker will provide a detailed discussion on the dark energy models within semi-symmetric metric gravity. Essentially, this theory is based on a connection with a special type of torsion, first introduced by Friedmann and Schouten. The Einstein equations in this geometry contain additional terms, which arise from torsion. Interpreting these as geometric-type dark energy effects, he will present three models based on three different equations of state. In each case, the predictions of the considered model are compared with the observational data of the Hubble function, and the standard ΛCDM paradigm. The findings indicate that semi-symmetric metric cosmological models give a good description of the observational data. Consequently, Friedmann’s initially proposed geometry emerges as a credible alternative to standard general relativity, in which dark energy has a purely geometric origin.

時間:2024.06.06(四) 16:00~17:30
頻道:Zoom ID:853-7454-4159 ←
講者:Lehel Csillag (Department of Physics, Babeș-Bolyai University, 1 Kogalniceanu Street, Cluj, Romania)


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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