Carregant...
Miniatura

Tipus de document

Article

Versió

Versió publicada

Data de publicació

Tots els drets reservats

Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/12385

Stability of de Sitter spacetime under isotropic perturbations in semiclassical gravity

Títol de la revista

Director/Tutor

ISSN de la revista

Títol del volum

Resum

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.

Citació

Citació

PÉREZ-NADAL, Guillem, ROURA CRUMOLS, Albert, VERDAGUER OMS, Enric. Stability of de Sitter spacetime under isotropic perturbations in semiclassical gravity. _Physical Review D_. 2008. Vol. 77, núm. 12, pàgs. 124033-1-124033-20. [consulta: 27 de gener de 2026]. ISSN: 0556-2821. [Disponible a: https://hdl.handle.net/2445/12385]

Exportar metadades

JSON - METS

Compartir registre