Adiabatic regularization of the graviton stress-energy tensor in de Sitter space-time

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dc.creatorFinelli, F.
dc.creatorMarozzi, G.
dc.creatorVacca, G. P.
dc.creatorVenturi, G.
dc.date2004-07-27
dc.date2005-01-14
dc.date.accessioned2026-07-07T11:42:57Z
dc.date.available2026-07-07T11:42:57Z
dc.descriptionWe study the renormalized energy-momentum tensor of gravitons in a de Sitter space-time. After canonically quantizing only the physical degrees of freedom, we adopt the standard adiabatic subtraction used for massless minimally coupled scalar fields as a regularization procedure and find that the energy density of gravitons in the E(3) invariant vacuum is proportional to H^4, where H is the Hubble parameter, but with a positive sign. According to this result the scalar expansion rate, which is gauge invariant in de Sitter space-time, is increased by the fluctuations. This implies that gravitons may then add to conformally coupled matter in driving the Starobinsky model of inflation.
dc.description5 pages, revtex, final version accepted for publication in PRD
dc.identifierhttps://arxiv.org/abs/gr-qc/0407101
dc.identifierhttp://arxiv.org/abs/gr-qc/0407101
dc.identifierPhys.Rev.D71:023522,2005
dc.identifierdoi:10.1103/PhysRevD.71.023522
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/201069
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Theory
dc.titleAdiabatic regularization of the graviton stress-energy tensor in de Sitter space-time
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