Electronic Resource
Springer
General relativity and gravitation
30 (1998), S. 159-172
ISSN:
1572-9532
Keywords:
TESTS OF GENERAL RELATIVITY
;
INFLATIONARY COSMOLOGY
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract A nonlocal form of the effective gravitational action could cure the unboundedness of euclidean gravity with Einstein action. On sub-horizon length scales the modified gravitational field equations seem compatible with all present tests of general relativity and post-Newtonian gravity. They induce a difference in the effective Newtonian constant between regions of space with vanishing or nonvanishing curvature scalar (or Ricci tensor). In cosmology they may lead to a value Ω 〈 1 for the critical density after inflation. The simplest model considered here appears to be in conflict with nucleosynthesis, but generalizations consistent with all cosmological observations seem conceivable.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1018837319976
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