M. Kleban

Publications79
h-index27
Citations3,112
Highly Influential Citations125
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Observational consequences of a landscape
In this paper we consider the implications of the ``landscape paradigm [1], [2] for the large scale properties of the universe. The most direct implication of a rich landscape is that our local…
Disturbing Implications of a Cosmological Constant
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 complementarity…
The black hole singularity in AdS/CFT
We explore physics behind the horizon in eternal AdS Schwarzschild black holes. In dimension d > 3 , where the curvature grows large near the singularity, we find distinct but subtle signals of this…
The trouble with de Sitter space
In this paper we assume the de Sitter space version of black hole Complementarity which states that a single causal patch of de Sitter space is described as an isolated finite temperature cavity…
McVittie's Legacy: Black Holes in an Expanding Universe
We prove that a class of solutions to Einstein's equations---originally discovered by McVittie in 1933---includes regular black holes embedded in Friedmann-Robertson-Walker cosmologies. If the…
Signatures of short distance physics in the cosmic microwave background
We systematically investigate the effect of short distance physics on the spectrum of temperature anistropies in the Cosmic Microwave Background produced during inflation. We present a general…
Initial Conditions for Inflation
Free scalar fields in de Sitter space have a one-parameter family of states invariant under the de Sitter group, including the standard thermal vacuum. We show that, except for the thermal vacuum,…
Vacua Morghulis
We conjecture that all vacua in string theory decay. More precisely, non-supersymmetric vacua in string theory are at most metastable and eventually decay, while supersymmetric vacua are only…
Beginning inflation in an inhomogeneous universe
Using numerical solutions of the full Einstein field equations coupled to a scalar inflaton field in 3+1 dimensions, we study the conditions under which a universe that is initially expanding, highly…
Analyzing Cosmic Bubble Collisions
We develop a set of controlled, analytic approximations to study the effects of bubble collisions on cosmology. We expand the initial perturbation to the inflaton field caused by the collision in a…
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