Is gravitational entropy quantized ?

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dc.creatorKothawala, Dawood
dc.creatorPadmanabhan, T.
dc.creatorSarkar, Sudipta
dc.date2008-07-09
dc.date.accessioned2026-07-07T12:44:41Z
dc.date.available2026-07-07T12:44:41Z
dc.descriptionIn Einstein's gravity, the entropy of horizons is proportional to their area. Several arguments given in the literature suggest that, in this context, both area and entropy should be quantized with an equally spaced spectrum for large quantum numbers. But in more general theories (like, for e.g, in the black hole solutions of Gauss-Bonnet or Lanczos-Lovelock gravity) the horizon entropy is \emph{not} proportional to area and the question arises as to which of the two (if at all) will have this property. We give a general argument that in all Lanczos-Lovelock theories of gravity, it is the \emph{entropy} that has equally spaced spectrum. In the case of Gauss-Bonnet gravity, we use the asymptotic form of quasi normal mode frequencies to explicitly demonstrate this result. Hence, the concept of a quantum of area in Einstein Hilbert (EH) gravity needs to be replaced by a concept of \emph{quantum of entropy} in a more general context.
dc.descriptionRevTeX 4; 4 pages; no figures
dc.identifierhttps://arxiv.org/abs/0807.1481
dc.identifierhttp://arxiv.org/abs/0807.1481
dc.identifierPhys.Rev.D78:104018,2008
dc.identifierdoi:10.1103/PhysRevD.78.104018
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/220853
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Theory
dc.titleIs gravitational entropy quantized ?
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