Statistics – Applications
Scientific paper
Mar 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992phrvd..45.1953s&link_type=abstract
Physical Review D (Particles, Fields, Gravitation, and Cosmology), Volume 45, Issue 6, 15 March 1992, pp.1953-1960
Statistics
Applications
38
Particle-Theory And Field-Theory Models Of The Early Universe, Semiclassical Theories And Applications, Fundamental Problems And General Formalism
Scientific paper
The same theory of semiclassical gravity that predicts Starobinsky inflation (de Sitter-like solutions driven only by higher-order curvature terms) also predicts flat space to be unstable to small perturbations. When semiclassical gravity is modified in a way suggested by and consistent with the perturbative nature of its derivation, flat space is predicted to be stable, in accord with observation, but Starobinsky inflation is no longer a solution. The modified semiclassical theory, constrained to only solutions perturbatively expandable in ħ, has the same dynamical degrees of freedom as the clasical gravitational field, despite the presence of fourth-order derivatives in the field equations. There are no de Sitter or de Sitter-like self-consistent solutions except in the presence of a cosmological constant, so inflation generated purely by curvature is not predicted. Furthermore, linearized gravitational perturbations in a de Sitter background (with a cosmological constant) show no signs of instability from quantum effects.
No associations
LandOfFree
No Starobinsky inflation from self-consistent semiclassical gravity does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with No Starobinsky inflation from self-consistent semiclassical gravity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and No Starobinsky inflation from self-consistent semiclassical gravity will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1490877