Basics of the pressuron

TL;DR

The pressuron is a dilaton-like scalar field that decouples in pressureless conditions, effectively reproducing general relativity, and this paper reviews its fundamental principles and behavior.

Contribution

This paper provides a comprehensive review of the pressuron, highlighting its unique decoupling mechanism and its implications for recovering general relativity.

Findings

Pressuron decouples in pressureless fluids.

It recovers general relativity in weak pressure limits.

Provides foundational understanding of pressuron dynamics.

Abstract

The pressuron is a specific case of a dilaton-like field that leads to a decoupling of the scalar-field in the field equation for pressureless fluids. Hence, the pressuron recovers general relativity in the limit of weak pressure. Here we review its basics.