Massive Gravity: A Lorentz-Symmetric Aether

TL;DR

This paper introduces a perspective on massive gravity by comparing it to Einstein gravity interacting with a medium that has unique properties, using an analogy with perfect fluids to provide heuristic insights.

Contribution

It presents a novel analogy between massive gravity and a medium with unusual properties, offering heuristic understanding through the perfect fluid analogy.

Findings

Massive gravity can be modeled as Einstein gravity coupled with a medium.

The medium in massive gravity exhibits properties similar to a Lorentz-symmetric aether.

This analogy provides new heuristic insights into the nature of massive gravity.

Abstract

This is a heuristic introduction to massive gravity based on an analogy with perfect fluids. I will argue that massive gravity can be thought of as Einstein gravity in the presence of a medium with unusual properties.