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5 papers · 2 filters
The effects of inhomogeneities on the cosmology of type IIB conifold transitions
Eran Palti, Paul Saffin, Jon Urrestilla
In this paper we examine the evolution of the effective field theory describing a conifold transition in type IIB string theory. Previous studies have considered such dynamics star…
Probabilities in the inflationary multiverse
Jaume Garriga, Delia Schwartz-Perlov, Alexander Vilenkin +1
Inflationary cosmology leads to the picture of a "multiverse," involving an infinite number of (spatially infinite) post-inflationary thermalized regions, called pocket universes.…
Anthropic prediction for Lambda and the Q catastrophe
Jaume Garriga, Alexander Vilenkin
We discuss probability distributions for the cosmological constant Lambda and the amplitude of primordial density fluctuations Q in models where they both are anthropic variables.…
Energy conditions for a generally coupled scalar field outside a reflecting sphere
Delia Schwartz-Perlov, Ken D. Olum
We calculate the stress-energy tensor for a scalar field with general curvature coupling, outside a perfectly reflecting sphere with Dirichlet boundary conditions. For conformal co…
Plate with a hole obeys the averaged null energy condition
Noah Graham, Ken D. Olum
The negative energy density of Casimir systems appears to violate general relativity energy conditions. However, one cannot test the averaged null energy condition (ANEC) using sta…