Pure Gravitational Back-Reaction Observables

Abstract

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.

15 pages, uses LaTeX2e

References in corpus (7)

• Reply to `Can infrared gravitons screen $\Lambda$?'
• Loops in inflationary correlation functions
• IR divergence does not affect the gauge-invariant curvature perturbation
• Can infrared gravitons screen $\Lambda$?
• Infrared instability of the de Sitter space
• Cosmological Horizon Modes and Linear Response in de Sitter Spacetime
• Backreaction during inflation: a physical gauge invariant formulation

Cited by in corpus (13)

• Perturbative Quantum Gravity Comes of Age
• Field equations and cosmology for a class of nonlocal metric models of MOND
• Graviton Loop Corrections to Vacuum Polarization in de Sitter in a General Covariant Gauge
• Asymptotic Symmetries in de Sitter and Inflationary Spacetimes
• Propagators for gauge-invariant observables in cosmology
• Invariant Measure of the One Loop Quantum Gravitational Back-Reaction on Inflation
• One-loop quantum gravitational backreaction on the local Hubble rate
• Tensor Mode Backreaction During Slow-roll Inflation
• Graviton backreaction on the local cosmological expansion in slow-roll inflation
• Non-commutative Geometry from Perturbative Quantum Gravity in de Sitter spacetime
• Classical Gravitational Back-Reaction
• Testing an Ansatz for the Leading Secular Loop Corrections from Quantum Gravity during Inflation
• The Case for Nonlocal Modifications of Gravity