New exact solutions for inflationary cosmological perturbations

Details New exact solutions for inflationary cosmological perturbations New exact solutions for inflationary cosmological perturbations

2000-05-26

arxiv.org/abs/astro-ph/0005542v2

Phys.Lett. B500 (2001) 1-7

Astronomy and Astrophysics

Astrophysics

12 pages, 5 figures, introduction improved, references added, accepted for publication in Phys. Lett. B

Scientific paper

10.1016/S0370-2693(01)00071-5

From a general ansatz for the effective potential of cosmological perturbations we find new, exact solutions in single-scalar-field inflation: a three parameter family of exact inflationary solutions that encompasses all exact solutions that have been known previously (power-law inflation, Easther's model, and a generalised version of Starobinsky's solution). The main feature of this new family is that the spectral indices are scale dependent.

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