There is strong evidence that the area of any surface limits the information content of
adjacent spacetime regions, at 1.4× 10 69 bits per square meter. This article reviews the …

In this paper, we review some highlights from the String theory, the black hole physics and
the doubly special relativity and some thought experiments which were suggested to probe …

Recent theoretical progress indicates that spacetime and gravity emerge together from the
entanglement structure of an underlying microscopic theory. These ideas are best …

A bstract Equilibrium finite temperature observables of a CFT can be described by a local
effective action for background fields—a “thermal effective action”. This effective action …

Applying the first law of thermodynamics to the apparent horizon of a Friedmann-Robertson-
Walker universe and assuming the geometric entropy given by a quarter of the apparent …

Along this review, we focus on the study of several properties of modified gravity theories, in
particular on black-hole solutions and its comparison with those solutions in General …

From a hydrodynamicist's point of view the inclusion of viscosity concepts in the macroscopic
theory of the cosmic fluid would appear most natural, as an ideal fluid is after all an …

Cosmological consequences of the brane world scenario are reviewed in a pedagogical
manner. According to the brane world idea, the standard model particles are confined on a …

We propose a novel prescription for computing the boundary stress tensor and charges of
asymptotically de Sitter (dS) spacetimes from data at early or late time infinity. If there is a …

An overview of some cosmological aspects of string theory is presented. Recent
developments are emphasized, especially the attempts to derive inflation or alternatives to …