Entropy in the Present and Early Universe

TL;DR

This paper analyzes how the concept of entropy has evolved from the early universe to the present, emphasizing the role of theory deformation and symmetry in understanding physical laws.

Contribution

It highlights the significance of theory deformation and symmetry in the conceptual development of entropy in cosmology and physics.

Findings

Entropy concept evolved over cosmic history

Deformation of physical theories relates to entropy changes

Symmetry plays a key role in entropy understanding

Abstract

This is a short analysis of the changes in the concept of entropy as applied to physics of the present-day and Early Universe. Of special interest is a leading role of such a notion as deformation of a physical theory. The relation to a symmetry of the corresponding theory is noted. As this work is not a survey, the relevant author's works are mainly considered. This paper is to be published in special issue "Symmetry and Entropy" of journal SYMMETRY: Culture and Science