Entropy of Anisotropic Universe and Fractional Branes

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dc.creatorRama, S. Kalyana
dc.date2007-02-26
dc.date2007-07-02
dc.date.accessioned2026-07-07T11:03:15Z
dc.date.available2026-07-07T11:03:15Z
dc.descriptionWe obtain the entropy of a homogeneous anisotropic universe applicable, by assumption, to the fractional branes in the universe in the model of Chowdhury and Mathur. The entropy for the 3 or 4 charge fractional branes thus obtained is not of the expected form E^{3/2} or E^2. One way the expected form is realised is if p \to ρfor the transverse directions and if the compact directions remain constant in size. These conditions are likely to be enforced by brane decay and annihilation, and by the S, T, U dualities. T duality is also likely to exclude high entropic cases, found in the examples, which arise due to the compact space contracting to zero size. Then the 4 charge fractional branes may indeed provide a detailed realisation of the maximum entropic principle we proposed recently to determine the number (3 + 1) of large spacetime dimensions.
dc.descriptionVersion 2: 21 pages. More discussion and references added. To appear in General Relativity and Gravitation
dc.identifierhttps://arxiv.org/abs/hep-th/0702202
dc.identifierhttp://arxiv.org/abs/hep-th/0702202
dc.identifierGen.Rel.Grav.39:1773-1788,2007
dc.identifierdoi:10.1007/s10714-007-0488-1
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/188528
dc.subjectHigh Energy Physics - Theory
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.titleEntropy of Anisotropic Universe and Fractional Branes
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