Webinar:- Isotropisation in the approach to a singularity
In the approach to a singularity in general relativity, spacetime often becomes largely shear dominated and highly anisotropic. Any speculative cosmological scenario with a contracting phase prior to a Big Bounce must therefore address the issue of large anisotropies. In this talk, the speaker will review this anisotropy problem and the status of isotropisation mechanisms in this context, which involve, e.g., modified gravity or non-perfect fluids. An emphasis will be given on the latter, in light of the recent work arXiv:2109.11701 [gr-qc].
講者： Jerome Quintin(Albert Einstein Institute)
※May participant write to [email protected] or [email protected] to request for meeting link.
“Copernicus Webinar and Colloquium Series”: To promote scientific discussions during this pandemic, they are organizing an online seminar series, i.e. Copernicus Webinar Series, seeking the most outstanding speakers to introduce innovative ideas and important progress in the field of gravity and cosmology. This series is named after the famous Polish Astronomer, Nicolaus Copernicus, whose discovery eventually marked the dawn of modern science.