Please use this identifier to cite or link to this item:
Title: Stability of de Sitter spacetime under isotropic perturbations in semiclassical gravity
Author: Pérez-Nadal, Guillem
Roura Crumols, Albert
Verdaguer Oms, Enric, 1950-
Keywords: Relativitat general (Física)
Gravetat quàntica
Pertorbació (Dinàmica quàntica)
Teoria quàntica de camps
General relativity (Physics)
Quantum gravity
Perturbation (Quantum dynamics)
Quantum field theory
Issue Date: 2008
Publisher: The American Physical Society
Abstract: A spatially flat Robertson-Walker spacetime driven by a cosmological constant is nonconformally coupled to a massless scalar field. The equations of semiclassical gravity are explicitly solved for this case, and a self-consistent de Sitter solution associated with the Bunch-Davies vacuum state is found (the effect of the quantum field is to shift slightly the effective cosmological constant). Furthermore, it is shown that the corrected de Sitter spacetime is stable under spatially isotropic perturbations of the metric and the quantum state. These results are independent of the free renormalization parameters.
Note: Reproducció digital del document publicat en format paper, proporcionada per PROLA i
It is part of: Physical Review D, 2008, vol. 77, núm. 12, p. 124033-1-124033-20
Related resource:
ISSN: 0556-2821
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)

Files in This Item:
File Description SizeFormat 
558479.pdf309.78 kBAdobe PDFView/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.