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Haug, E.G. (2025) The Hubble Sphere as an Extremal Reissner-Nordström Black Hole Carnot Engine Operating at the CMB Temperature of . Cambridge University Press.

has been cited by the following article:

• TITLE: Cosmic Entropy and Conversation of Energy of the Type ST=E

  AUTHORS: Espen Gaarder Haug

  KEYWORDS: Black Hole Entropy, Hubble Sphere Entropy, Energy Conservation, Quantum Gravity

  JOURNAL NAME: Open Journal of Microphysics, Vol.15 No.4, November 3, 2025

  ABSTRACT: We will discuss how the entropy of the growing black hole Hubble sphere in R H t =ct cosmology, as described by Haug and Tatum, is fully consistent with the conservation of energy in the form ST=E .