Perturbation spectrum of an expanding fluid with negligible initial power on small scales

Details Perturbation spectrum of an expanding fluid with negligible initial power on small scales Perturbation spectrum of an expanding fluid with negligible initial power on small scales

Oct 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996phrvd..54.4744z&link_type=abstract

Physical Review D (Particles, Fields, Gravitation, and Cosmology), Volume 54, Issue 8, 15 October 1996, pp.4744-4749

Physics

1

Superclusters, Large-Scale Structure Of The Universe, Isotropic Turbulence, Homogeneous Turbulence, Hydrodynamics

Scientific paper

If initial power on small scales is negligible, nonlinear mode coupling can transfer power from large scales to small scales, leading to a density perturbation spectrum on those scales. A functional method is applied to study this case on the basis of a Newtonian description of an expanding fluid in an FRW universe when matter dominated and the behavior of the density perturbation spectrum is investigated.

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