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Solutions to the Cosmic Initial Entropy Problem without Equilibrium Initial Conditions

2017
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Entropy
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The entropy of the observable universe is increasing. Thus, at earlier times the entropy was lower. However, the cosmic microwave background radiation reveals an apparently high entropy universe close to thermal and chemical equilibrium. A two-part solution to this cosmic initial entropy problem is proposed. Following Penrose, we argue that the evenly distributed matter of the early universe is equivalent to low gravitational entropy. There are two competing explanations for how this initial

doi:10.3390/e19080411
fatcat:mfrppy77tjdf7a325hxxeskl7i