Friedmann Equations and Thermodynamics of Apparent Horizons

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dc.creatorGong, Yungui
dc.creatorWang, Anzhong
dc.date2007-04-06
dc.date2007-11-14
dc.date.accessioned2026-07-07T10:59:25Z
dc.date.available2026-07-07T10:59:25Z
dc.descriptionWith the help of a masslike function which has dimension of energy and equals to the Misner-Sharp mass at the apparent horizon, we show that the first law of thermodynamics of the apparent horizon $dE=T_AdS_A$ can be derived from the Friedmann equation in various theories of gravity, including the Einstein, Lovelock, nonlinear, and scalar-tensor theories. This result strongly suggests that the relationship between the first law of thermodynamics of the apparent horizon and the Friedmann equation is not just a simple coincidence, but rather a more profound physical connection.
dc.descriptionno figures, V2: re-organized and re-writtend, main results and conclusion unchanged, Phys. Rev. Lett. in press
dc.identifierhttps://arxiv.org/abs/0704.0793
dc.identifierhttp://arxiv.org/abs/0704.0793
dc.identifierPhys.Rev.Lett.99:211301,2007
dc.identifierdoi:10.1103/PhysRevLett.99.211301
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/187396
dc.subjectHigh Energy Physics - Theory
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.titleFriedmann Equations and Thermodynamics of Apparent Horizons
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