In this paper, we propose a model based on wedge holography that can describe the multiverse. holography, consider two gravitating baths, one of which has strong gravity and other weak gravity. To multiverse, $2n$ Karch-Randall branes, various $d$-dimensional universes are localized these branes. These branes embedded in $(d+1)$-dimensional spacetime. The is useful obtaining Page curve black ho...

We examine the deSitter entropy in braneworld model with Gauss-Bonnet/Lovelock terms. Then, we can see that computed through Euclidean action exactly coincides holographic entanglement entropy.

We explore some foundational issues regarding the splitting of D-dimensional Einstein Field Equations (EFE’s) with respect to timelike and spacelike (D 1)-dimensional hypersurfaces, first without and then with thin matter sheets such as branes. We begin to implement methodology, that is well-established for the GR Cauchy and initial value problems (CP and IVP), in the new field of GR-based bran...

We review some general aspects of braneworld cosmologies in which an inflationary period driven by a scalar field confined on the brane is described by a nonstandard effective Friedmann equation. The perturbation spectra, consistency equations and observational consequences of these models are considered.