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Thermodynamic instability of dark energy equation of state (2302.03866v1)
Published 8 Feb 2023 in gr-qc
Abstract: We derive the dark energy fluid equation of state $P = -\epsilon = {\rm const.}$ as an extremum of entropy, subject to the Hamiltonian constraint of General Relativity. However, we identify perturbations that can render this extremum an entropy minimum designating a thermodynamic instability and specify the mathematical condition for this to occur.
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