A macroscopic view to the standard cosmological model

TL;DR

This paper investigates how microscopic oscillations of scalar fields influence the macroscopic behavior of the early universe in the standard cosmological model, revealing oscillating equations of state and dominant energy contributions.

Contribution

It introduces a macroscopic averaging approach to scalar field dynamics, highlighting the impact of Compton-scale oscillations on cosmological evolution.

Findings

Microscopic oscillations significantly affect the scalar field's energy density.

The effective equation of state oscillates between inflationary and rigid states.

The macroscopic equation of state remains non-relativistic at large times.

Abstract

The averaging of the dynamic functions of the standard cosmological model (SCM) at its early stage with the dominance of the scalar field is carried out. It is shown that microscopic oscillations with Compton period provide the major contribution to the macroscopic energy density of the scalar field at large times at this stage. In this case, the effective equation of state of the scalar field oscillates between the inflationary and the extremely rigid ones, while the macroscopic equation of state is non-relativistic.