Inflation as the Unique Causal Mechanism for Generating Density Perturbations on Scales Well Above the Hubble Radius

Details Inflation as the Unique Causal Mechanism for Generating Density Perturbations on Scales Well Above the Hubble Radius Inflation as the Unique Causal Mechanism for Generating Density Perturbations on Scales Well Above the Hubble Radius

1994-10-27

arxiv.org/abs/astro-ph/9410083v2

Phys.Rev.D51:5347-5351,1995

Astronomy and Astrophysics

Astrophysics

5 pages uuencoded postscript (LaTeX file available from author), SUSSEX-AST 94/10-2

Scientific paper

10.1103/PhysRevD.51.5347

An examination is made of the widely held belief that inflation is the only possible causal mechanism capable of generating density perturbations on scales well in excess of the Hubble radius. A simple proof is given, which relies only on the assumption that our understanding of the universe from nucleosynthesis onwards is correct. No assumption of the underlying gravitational theory is necessary beyond that it is a metric theory.

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