Ultra-Light Scalar Fields and the Growth of Structure in the Universe

Details Ultra-Light Scalar Fields and the Growth of Structure in the Universe Ultra-Light Scalar Fields and the Growth of Structure in the Universe

2010-09-17

arxiv.org/abs/1009.3501v1

Phys.Rev.D82:103528,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 11 figures

Scientific paper

10.1103/PhysRevD.82.103528

Ultra-light scalar fields, with masses of between m=10^{-33} eV and m=10^{-22} eV, can affect the growth of structure in the Universe. We identify the different regimes in the evolution of ultra-light scalar fields, how they affect the expansion rate of the universe and how they affect the growth rate of cosmological perturbations. We find a number of interesting effects, discuss how they might arise in realistic scenarios of the early universe and comment on how they might be observed.

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