A bstract A quantum extremal island suggests that a region of spacetime is encoded in the
quantum state of another system, like the encoding of the black hole interior in Hawking …

We formulate a version of the information paradox in de Sitter spacetime and show that it is
solved by the emergence of entanglement islands in the context of the De Sitter/de Sitter …

A bstract We compute the time-dependent entanglement entropy of a CFT which starts in
relatively simple initial states. The initial states are the thermofield double for thermal states …

A bstract We develop a new setting in the framework of braneworld holography to describe a
pair of coupled and entangled uniformly accelerated universes. The model consists of two …

A bstract A long-standing and intriguing question is: does the holographic principle apply to
cosmologies like de Sitter spacetime? In this work, we consider a half dS spacetime wherein …

The AdS/CFT correspondence relates certain strongly-coupled CFTs with large effective
central charge c eff to semi-classical gravitational theories with AdS asymptotics. We …

Recently, in various theoretical works, path-breaking progress has been made in recovering
the well-known page curve of an evaporating black hole with quantum extremal islands …

We show that the entropy of cosmological perturbations originating as quantum vacuum
fluctuations in the very early universe, including the contribution of the leading nonlinear …

These lecture notes provide an overview of different aspects of de Sitter space and their
plausible holographic interpretations. We start with a general description of the classical …

We study the dynamics of entanglement entropy for weakly excited states in conformal field
theories by using anti-de Sitter/conformal field theory (AdS/CFT). This is aimed at a first step …