Articles with "separate universes" as a keyword



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Separate Universes beyond General Relativity

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Published in 2017 at "Physical Review D"

DOI: 10.1103/physrevd.95.043529

Abstract: We establish purely geometric or metric-based criteria for the validity of the separate universe ansatz, under which the evolution of small-scale observables in a long-wavelength perturbation is indistinguishable from a separate Friedmann-Robertson-Walker cosmology in their… read more here.

Keywords: cosmology; separate universes; general relativity; perturbation ... See more keywords