TITLE:
Cosmic Entropy Prediction with Extremely High Precision in R h =ct Cosmology
AUTHORS:
Espen Gaarder Haug, Eugene Terry Tatum
KEYWORDS:
Bekenstein-Hawking Entropy, Black Hole Entropy, Hubble Sphere, CMB Temperature, Cosmological Constant Problem, Hubble Tension, Holographic Universe, Quantum Cosmology
JOURNAL NAME:
Journal of Applied Mathematics and Physics,
Vol.13 No.10,
October
30,
2025
ABSTRACT: We present how the Bekenstein-Hawking entropy of a growing black hole variant of
R
h
=ct
cosmology model can be re-written as a function of the Cosmic Microwave Background (CMB) radiation temperature or Hubble parameter, rather than the Hubble radius, as first pointed out by Tatum and Seshavatharam [1]. We then show how our CMB temperature formulae lead to much higher precision in the estimated entropy of the Hubble radius universe, since the CMB temperature can be measured with great precision. We also briefly discuss how the Schwarzschild metric can be re-written as a function of the Bekenstein-Hawking entropy, and how the entropy of the universe can be directly linked to recent estimates of the number of quantum operations in the universe since its beginning.