Emergent gravity and the quantum

TL;DR

This paper proposes that gravity emerges from quantum mechanics acting on a universe with matter and a cosmological constant, leading to an effective Newtonian gravity.

Contribution

It demonstrates that gravity can be viewed as an emergent phenomenon arising from quantum effects on fundamental degrees of freedom.

Findings

Quantum mechanics induces an attractive gravitational potential.

An effective Newton's coupling naturally emerges.

Gravity should be quantized at the fundamental level.

Abstract

We show that if one starts with a Universe with some matter and a cosmological constant, then quantum mechanics naturally induces an attractive gravitational potential and an effective Newton's coupling. Thus gravity is an emergent phenomenon and what should be quantized are the fundamental degrees of freedom from which it emerges.