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Entropy in the present and early Universe. (English) Zbl 1274.85010

Summary: 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 authors’ works are mainly considered.

MSC:

85A40 Astrophysical cosmology
85-01 Introductory exposition (textbooks, tutorial papers, etc.) pertaining to astronomy and astrophysics
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