Nonperturbative semiclassical stability of de Sitter spacetime for small metric deviations


Autoria(s): Fröb, Markus B.; Papadopoulos, D. B.; Roura, Albert; Verdaguer Oms, Enric, 1950-
Contribuinte(s)

Universitat de Barcelona

Data(s)

07/04/2014

Resumo

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.

Identificador

http://hdl.handle.net/2445/53286

Idioma(s)

eng

Publicador

American Physical Society

Direitos

(c) American Physical Society, 2013

info:eu-repo/semantics/openAccess

Palavras-Chave #Cosmologia quàntica #Teoria quàntica de camps #Gravetat quàntica #Equacions de camp d'Einstein #Quantum cosmology #Quantum field theory #Quantum gravity #Einstein field equations
Tipo

info:eu-repo/semantics/article

info:eu-repo/semantics/publishedVersion