Conformal symmetry and deflationary gas universe

TL;DR

This paper models the universe's transition from an initial de Sitter phase to an FLRW phase as a non-equilibrium state of a self-interacting gas, emphasizing conformal symmetry and a decreasing refraction index.

Contribution

It introduces a novel description of the universe's deflationary evolution using conformal symmetry and optical metric concepts in a gas-based framework.

Findings

Transition dynamics exhibit conformal timelike symmetry.

Refraction index decreases from large initial value to unity.

Provides a new perspective on cosmic evolution as a non-equilibrium gas process.

Abstract

We describe the ``deflationary'' evolution from an initial de Sitter phase to a subsequent Friedmann-Lema\^{\i}tre-Robertson-Walker (FLRW) period as a specific non-equilibrium configuration of a self-interacting gas. The transition dynamics corresponds to a conformal, timelike symmetry of an ``optical'' metric, characterized by a refraction index of the cosmic medium which continously decreases from a very large initial value to unity in the FLRW phase.