Seminar〝On the Nonrelativistic Expansion of General Relativity〞

Star-UBB Seminar Series:- On the Nonrelativistic Expansion of General Relativity(GR)

In this talk the speaker will review the covariant 1/c expansion of GR where c is the speed of light. When expanding the Einstein equations and assuming the weak field approximation this leads to Newtonian gravity at leading order and to post-Newtonian corrections at higher orders in 1/c. However, one does not need to assume weak fields and this leads to a novel regime of strong nonrelativistic gravity. The speaker will discuss how the covariant 1/c expansion can be used to revive the classical approach to the study of post-Newtonian corrections and how they are useful for the study of quantum systems in fixed gravitational backgrounds.

時間:2023.03.30(四) 16:00~17:00
頻道:Zoom ID:853-7454-4159 ←
講者:Dr. Jelle Hartong (School of Mathematics and Maxwell Institute for Mathematical Sciences, University of Edinburgh, Edinburgh, United Kingdom)


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.


Verified by MonsterInsights