AEther as an Inevitable Consequence of Quantum Gravity

TL;DR

This paper explores how quantum gravity's lack of an invariant vacuum state implies the necessity of an aether-like concept, introducing a preferred reference frame to describe universe expansion and black holes.

Contribution

It proposes a framework for an aether concept rooted in quantum gravity, linking vacuum properties to preferred reference systems in cosmology and black hole physics.

Findings

Quantum gravity implies a non-invariant vacuum state.

An aether-like reference frame may be necessary in quantum gravity.

The approach connects universe expansion, black holes, and decoherence.

Abstract

The fact that quantum gravity does not admit an invariant vacuum state has far-reaching consequences for all physics. It points out that space could not be empty, and we return to the notion of an aether. Such a concept requires a preferred reference frame for describing universe expansion and black holes. Here, we intend to find a reference system or class of metrics that could be attributed to ``aether''. We discuss a vacuum and quantum gravity from three essential viewpoints: universe expansion, black hole existence, and quantum decoherence.