The subject is the thermodynamics of dark energy. Thermodynamically, the ratio of dark energy to CMR temperature has the units of entropy, has a well-defined numerical value at every moment of cosmological history, and increases in time monotonically without limit. The proposal is that it is the cosmological entropy, aka dark entropy. Discussion compares it to other notions of entropy. Dark entropy is a necessary prelude to DEH IV, which is about the thermodynamics of dark matter.
References
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Togeas, J. (2024) A Dark Energy Hypothesis I. Journal of High Energy Physics, Gravitation, and Cosmology, 10, 1138-1141. https://doi.org/10.4236/jhepgc.2024.103068
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Togeas, J. (2024) A Dark Energy Hypothesis II. Journal of High Energy Physics, Gravitation, and Cosmology, 10, 1142-1151. https://doi.org/10.4236/jhepgc.2024.103069
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Eddington, A. (1928) The Nature of the Physical World. Cambridge University Press. https://doi.org/10.5962/bhl.title.5859
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Einstein, A. (1917) Cosmological Considerations of the General Theory of Relativity. In: Perrett, W. and Jeffery, G.B., Eds., The Principle of Relativity. Dover Publications, Inc., 177-188.
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North, J. (1965) The Measure of the Universe. Oxford University Press, Ch. 5.
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Cohen, I. (1958) Isaac Newton: Papers & Letters on Natural Philosophy. Harvard University Press, 292.
