Cosmic No Hair Theorems and Inflation - INSPIRE

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Cosmic No Hair Theorems and Inflation

John D. Barrow
(
- Sussex U.
)

1987

5 pages

Published in:

Phys.Lett.B 187 (1987) 12-16

Published: 1987

DOI:

10.1016/0370-2693(87)90063-3

View in:

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Abstract: (Elsevier)

An exact power-law inflationary solution possessing an exponential potential is given. We note that recent attempts to prove cosmic no-hair theorems for cosmological inflation exclude a wide range of ever-expanding cosmological models by the assumptions that positive spatial curvature implies the recopllpse of closed universes. Examples are given to show that, contrary to previous expectations, perfect fluid cosmologies with p = ( γ −1) ϵ need not approach isotropy and homogeneity as t →∞ for any constant γ > 0. The relevance to the problem of closed universes which recollapse before inflation occurs is also discussed.

ASTROPHYSICS
MODEL: INFLATION
FIELD THEORY: SCALAR
FIELD THEORY: DE SITTER
FIELD EQUATIONS: SOLUTION
MODEL: FLUID

References(46)

Figures(0)

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