A Newtonian Model for the Quantum Gravitational Back-Reaction on Inflation

Abstract

Quantum gravitational back-reaction offers a simultaneous explanation for why the cosmological constant is so small and a natural model of inflation in which scalars play no role. In this talk I review previous work and present a simple model of the mechanism in which the induced stress tensor behaves like negative vacuum energy with a density proportional to $-\Lambda /8\pi G\cdot (G\Lambda {)}^2\cdot Ht$. The model also highlights the essential role of causality in back-reaction.

4 pages, LaTeX 2.6, no figures. Talk given at the International Meeting on Quantum Gravity and Spectral Geometry, Naples, Italy, July 2-7, 2001

References in corpus (3)

• The Cosmological Constant
• A Flat Universe from High-Resolution Maps of the Cosmic Microwave Background Radiation
• MAXIMA-1: A Measurement of the Cosmic Microwave Background Anisotropy on angular scales of 10 arcminutes to 5 degrees

Cited by in corpus (4)

• Reply to `Can infrared gravitons screen $\Lambda$?'
• A Simplified Quantum Gravitational Model of Inflation
• Secular effects on inflation from one-loop quantum gravity
• The Cosmological Constant Problem, an Inspiration for New Physics