Generalized Holographic Cosmology: low-redshift observational constraint

Abstract

Four-dimensional cosmological models are studied on a boundary of a five-dimensional Anti-de Sitter (AdS 5 ) black hole with AdS Reissner-Nordström and scalar charged Reissner-Nordström black hole solutions, where we call the former a "Hairless" black hole and the latter a "Hairy" black hole. To obtain the Friedmann-Robertson-Walker (FRW) spacetime metric on the boundary of the AdS 5 black hole, we employ Eddington-Finkelstein (EF) coordinates to the bulk geometry. We then derive modified Friedmann equations on a boundary of the AdS 5 black hole via AdS/CFT correspondence and discuss its cosmological implications. The late-time acceleration of the universe is investigated in our models. The contributions coming from the bulk side is treated as dark energy source, and we perform MCMC analyses using observational data. Compared to the ΛCDM model, our models contain additional free parameters; therefore, to make a fair comparison, we use the Akaike information criterion (AIC) and the Bayesian information criterion (BIC) to analyze our results. Our numerical analyses show that our models can explain the observational data as reliable as the ΛCDM model does for the current data.

Observational Constraints on the Cosmology with Holographic Dark Fluid

“…Finally, we comment on the connection with the generalized holographic cosmology based on the AdS/CFT correspondences [38][39][40][41], where the holographic stress-energy is living on the boundary of the AdS spacetime. In this paper, we started with the braneworld scenario in AdS.…”