From quantum fluctuations to large-scale structures

Details From quantum fluctuations to large-scale structures From quantum fluctuations to large-scale structures

Mar 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994gregr..26..299h&link_type=abstract

General Relativity and Gravitation, Volume 26, Issue 3, pp.299-306

Physics

4

Scientific paper

An acceleration phase in the early universe allows microscopic quantum fluctuations inside a causal domain to expand into macroscopic ripples in the spacetime metric. These, in turn, can evolve into large-scale structures in the universe. After its generation from quantum fluctuations, a ripple in the metric spends a long period outside the causal domain where its evolution is characterized by a conserved amplitude, a fact closely related to the large-scale Friedmann-like evolution of the perturbed Friedmann universe. We show that, under the assumption of linear processes, the generation and evolution of large-scale structures can be described quite simply.

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