Thermodynamical properties of dark energy

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dc.creatorGong, Yungui
dc.creatorWang, Bin
dc.creatorWang, Anzhong
dc.date2006-11-30
dc.date2007-06-22
dc.date.accessioned2026-07-07T10:37:05Z
dc.date.available2026-07-07T10:37:05Z
dc.descriptionWe have investigated the thermodynamical properties of dark energy. Assuming that the dark energy temperature $T\sim a^{-n}$ and considering that the volume of the Universe enveloped by the apparent horizon relates to the temperature, we have derived the dark energy entropy. For dark energy with constant equation of state $w>-1$ and the generalized Chaplygin gas, the derived entropy can be positive and satisfy the entropy bound. The total entropy, including those of dark energy, the thermal radiation and the apparent horizon, satisfies the generalized second law of thermodynamics. However, for the phantom with constant equation of state, the positivity of entropy, the entropy bound, and the generalized second law cannot be satisfied simultaneously.
dc.description5 two column pages, 2 figures; v2: discussion on thermal equilibrium with the horizon is added, v3: minor corrections, published in PRD
dc.identifierhttps://arxiv.org/abs/gr-qc/0611155
dc.identifierhttp://arxiv.org/abs/gr-qc/0611155
dc.identifierPhys.Rev.D75:123516,2007
dc.identifierdoi:10.1103/PhysRevD.75.123516
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/180262
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Theory
dc.titleThermodynamical properties of dark energy
dc.typetext

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