Recent cosmological observations suggest the existence of a positive cosmological constant
Λ with the magnitude Λ (Gℏ/c3)≈ 10− 123. This review discusses several aspects of the …

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 …

We compute the three point correlation functions for primordial scalar and tensor fluctuations
in single field inflationary models. We obtain explicit expressions in the slow roll limit where …

We review the formalism of holographic renormalization. We start by discussing
mathematical results on asymptotically anti-de Sitter (AdS) spacetimes. We then outline the …

A bstract We describe in more detail the general relation uncovered in our previous work
between boundary correlators in de Sitter (dS) and in Euclidean anti-de Sitter (EAdS) space …

In this paper we take the first steps towards bridging the gap between the conformal and
cosmological bootstrap programs. We present a simple general relation between tree-level …

In this paper we consider the implications of a cosmological constant for the evolution of the
universe, under a set of assumptions motivated by the holographic and horizon …

Minkowski space can be sliced, outside the light-cone, in terms of Euclidean anti-de Sitter
and Lorentzian de Sitter slices. In this paper we investigate what happens when we apply …

Hawking radiation can usefully be viewed as a semiclassical tunneling process that
originates at the black hole horizon. The same basic premise should apply to de Sitter …

We define an S matrix for massive scalar fields on a fixed de Sitter spacetime, in the
expanding patch coordinates relevant for early Universe cosmology. It enjoys many of the …