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2008

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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/12385

Stability of de Sitter spacetime under isotropic perturbations in semiclassical gravity

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http://dx.doi.org/10.1103/PhysRevD.77.124033

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.

Subject

Relativitat general (Física), Gravetat quàntica, Cosmologia, Pertorbació (Dinàmica quàntica), Teoria quàntica de camps

Subject (English)

General relativity (Physics), Quantum gravity, Cosmology, Perturbation (Quantum dynamics), Quantum field theory

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Articles publicats en revistes (Física de la Matèria Condensada)

Citation

PÉREZ-NADAL, Guillem, ROURA CRUMOLS, Albert and VERDAGUER OMS, Enric. Stability of de Sitter spacetime under isotropic perturbations in semiclassical gravity. Physical Review D. 2008. Vol. 77, num. 12, pags. 124033-1-124033-20. ISSN 0556-2821. [consulted: 14 of August of 2026]. Available at: https://hdl.handle.net/2445/12385

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