Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/12385
Title: Stability of de Sitter spacetime under isotropic perturbations in semiclassical gravity
Author: Pérez-Nadal, Guillem
Roura, Albert
Verdaguer Oms, Enric, 1950-
Keywords: Relativitat general (Física)
Gravetat quàntica
Cosmologia
Pertorbació (Dinàmica quàntica)
Teoria quàntica de camps
General relativity (Physics)
Quantum gravity
Cosmology
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 http://dx.doi.org/10.1103/PhysRevD.77.124033
It is part of: Physical Review D, 2008, vol. 77, núm. 12, p. 124033-1-124033-20
URI: http://hdl.handle.net/2445/12385
ISSN: 0556-2821
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)

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