Validity of the `Conservation Law' in the Evolution of Cosmological Perturbations

Details Validity of the `Conservation Law' in the Evolution of Cosmological Perturbations Validity of the `Conservation Law' in the Evolution of Cosmological Perturbations

1997-04-28

arxiv.org/abs/astro-ph/9704271v2

Mon.Not.Roy.Astron.Soc.295:873-876,1998

Astronomy and Astrophysics

Astrophysics

4 pages, 2 figures, uses epsf.sty and MNRAS style file mn.sty (to successfully print on American paper format use "dvips -t le

Scientific paper

10.1046/j.1365-8711.1998.01290.x

It is shown that the `conservation law' for metric fluctuations with long wavelengths is indeed applicable for growing modes of perturbations, which are of interest in cosmology, in spite of a recent criticism [L. P. Grishchuk, Preprint gr-qc/9511074, now published in N. Sanchez, A. Zichichi (eds.), `String Gravity and Physics at the Planck Scale', Kluwer, Dordrecht, p. 369 (1996)]. This is demonstrated both by general arguments, and also by presenting an explicitly solvable toy model for the evolution of metric perturbations during inflation.

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