A simple, heuristic derivation of our 'no backreaction' results

Abstract

We provide a simple discussion of our results on the backreaction effects of density inhomogeneities in cosmology without mentioning one-parameter families or weak limits. Emphasis is placed on the manner in which ‘averaging’ is done and the fact that one is solving Einstein’s equation. The key assumptions and results that we rigorously derived within our original math- ematical framework are thereby explained in a heuristic way.

Stephen R. Green

Nottingham Research Fellow

I am a theoretical physicist studying gravitational waves, based at the University of Nottingham. My main interests are in black hole perturbation theory and applying probabilistic machine-learning methods to analyze LIGO data.