Semiclassical (QFT) and Quantum (String) anti - de Sitter Regimes: New Results

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dc.creatorBouchareb, A.
dc.creatorMedrano, M. Ramon
dc.creatorSanchez, N. G.
dc.date2006-06-15
dc.date.accessioned2026-07-07T10:42:26Z
dc.date.available2026-07-07T10:42:26Z
dc.descriptionWe compute the quantum string entropy S_s(m, H) from the microscopic string density of states of mass m in Anti de Sitter space-time. For high m, (high Hm -->c/α'), no phase transition occurs at the Anti de Sitter string temperature T_{s} which is higher than the flat space (Hagedorn) temperature t_{s}. (the Hubble constant H acts as producing a smaller string constant and thus, a higher tension). T_s is the precise quantum dual of the semiclassical (QFT) Anti de Sitter temperature scale . We compute the quantum string emission by a black hole in Anti de Sitter space-time (bhAdS). In the early evaporation stage, it shows the QFT Hawking emission with temperature T_{sem~bhAdS}, (semiclassical regime). For T_{sem~bhAdS}--> T_{s}, it exhibits a phase transition into a Anti de Sitter string state. New string bounds on the black hole emerge in the bhAdS string regime. We find a new formula for the full (quantum regime included) Anti de Sitter entropy S_{sem}, as a function of the usual Bekenstein-Hawking entropy S_{sem}^(0). For low H (semiclassical regime), S_{sem}^(0) is the leading term but for high H (quantum regime), no phase transition operates, in contrast to de Sitter space, and the entropy S_{sem} is very different from the Bekenstein-Hawking term S_{sem}^(0).
dc.descriptionComments 26 pages; no figures
dc.identifierhttps://arxiv.org/abs/hep-th/0606143
dc.identifierhttp://arxiv.org/abs/hep-th/0606143
dc.identifierInt.J.Mod.Phys.A22:1395-1416,2007
dc.identifierdoi:10.1142/S0217751X07035008
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/181944
dc.subjectHigh Energy Physics - Theory
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Phenomenology
dc.titleSemiclassical (QFT) and Quantum (String) anti - de Sitter Regimes: New Results
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