1306.6441 (N. C. Tsamis et al.)

Pure Gravitational Back-Reaction Observables    [PDF]

N. C. Tsamis, R. P. Woodard

After discussing the various issues regarding and requirements on pure quantum gravitational observables in homogeneous-isotropic conditions, we construct a composite operator observable satisfying most of them. We also expand it to first order in the loop counting parameter and suggest it as a physical quantifier of gravitational back-reaction in an initially inflating cosmology.

View original: http://arxiv.org/abs/1306.6441