Stability of de Sitter spacetime under isotropic perturbations in semiclassical gravity

Journal Article · Sun Jun 15 00:00:00 EDT 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.77.124033· OSTI ID:21214868

Perez-Nadal, Guillem; Roura, Albert; Verdaguer, Enric ^[1]

---

1. Departament de Fisica Fonamental, Universitat de Barcelona, Avinguda Diagonal 647, 08028 Barcelona (Spain)

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.

• OSTI ID: 21214868
• Journal Information: Physical Review. D, Particles Fields, Vol. 77, Issue 12; Other Information: DOI: 10.1103/PhysRevD.77.124033; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMOLOGICAL CONSTANT
DE SITTER GROUP
EQUATIONS
GRAVITATION
MATHEMATICAL SOLUTIONS
PERTURBATION THEORY
RENORMALIZATION
SCALAR FIELDS
SEMICLASSICAL APPROXIMATION
SPACE-TIME
VACUUM STATES