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Title: | Nonperturbative semiclassical stability of de Sitter spacetime for small metric deviations |
Author: | Fröb, Markus Benjamin Papadopoulos, Demetrios B. Roura Crumols, Albert Verdaguer Oms, Enric, 1950- |
Keywords: | Cosmologia quàntica Teoria quàntica de camps Gravetat quàntica Equacions de camp d'Einstein Quantum cosmology Quantum field theory Quantum gravity Einstein field equations |
Issue Date: | 2013 |
Publisher: | American Physical Society |
Abstract: | We consider the linearized semiclassical Einstein equations for small deviations around de Sitter spacetime including the vacuum polarization effects of conformal fields. Employing the method of order reduction, we find the exact solutions for general metric perturbations (of scalar, vector and tensor type). Our exact (nonperturbative) solutions show clearly that in this case de Sitter is stable with respect to small metric deviations and a late-time attractor. Furthermore, they also reveal a breakdown of perturbative solutions for a sufficiently long evolution inside the horizon. Our results are valid for any conformal theory, even self-interacting ones with arbitrarily strong coupling. |
Note: | Reproducció del document publicat a: http://dx.doi.org/10.1103/PhysRevD.87.064019 |
It is part of: | Physical Review D, 2013, vol. 87, p. 064019-1-064019-19 |
URI: | http://hdl.handle.net/2445/53286 |
Related resource: | http://dx.doi.org/10.1103/PhysRevD.87.064019 |
ISSN: | 1550-7998 |
Appears in Collections: | Articles publicats en revistes (Física de la Matèria Condensada) |
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620751.pdf | 287.12 kB | Adobe PDF | View/Open |
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