Boltzmann Entropy of a Newtonian Universe
AbstractA dynamical estimate is given for the Boltzmann entropy of the Universe, under the simplifying assumptions provided by Newtonian cosmology. We first model the cosmological fluid as the probability fluid of a quantum-mechanical system. Next, following current ideas about the emergence of spacetime, we regard gravitational equipotentials as isoentropic surfaces. Therefore, gravitational entropy is proportional to the vacuum expectation value of the gravitational potential in a certain quantum state describing the matter contents of the Universe. The entropy of the matter sector can also be computed. While providing values of the entropy that turn out to be somewhat higher than existing estimates, our results are in perfect compliance with the upper bound set by the holographic principle. View Full-Text
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Cabrera, D.; Fernández de Córdoba, P.; Isidro, J. Boltzmann Entropy of a Newtonian Universe. Entropy 2017, 19, 212.
Cabrera D, Fernández de Córdoba P, Isidro J. Boltzmann Entropy of a Newtonian Universe. Entropy. 2017; 19(5):212.Chicago/Turabian Style
Cabrera, D.; Fernández de Córdoba, Pedro; Isidro, J.M. 2017. "Boltzmann Entropy of a Newtonian Universe." Entropy 19, no. 5: 212.
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