Promising findings for simultaneous alleviation of major Cosmological tensions through the $\Lambda_{\rm s}$CDM cosmology

In this talk, Prof. Ozgur Akarsu (Department of Physics, Istanbul Technical University, Turkey) will begin with a brief introduction to the $\Lambda_{\rm s}$CDM model. This model explores a recent conjecture suggesting a rapid transition of the universe from anti-de Sitter vacua to de Sitter vacua. Specifically, the cosmological constant switches sign from negative to positive at redshift $z_\dagger\sim 1.7$, inspired by the graduated dark energy (gDE).