Stable wormholes in scalar-tensor theories

We reconsider the issue of whether scalar-tensor theories can admit stable wormhole configurations supported by a non-trivial radial profile for the scalar field. Using a recently proposed effective theory for perturbations around static, spherically symmetric backgrounds, we show that scalar-tensor...

Descripción completa

Detalles Bibliográficos
Autores principales: Franciolini, Gabriele, Hui, Lam, Penco, Riccardo, Santoni, Luca, Trincherini, Enrico
Lenguaje:eng
Publicado: 2018
Materias:
gr-qc
General Relativity and Cosmology
hep-th
Particle Physics - Theory
Acceso en línea:https://dx.doi.org/10.1007/JHEP01(2019)221
http://cds.cern.ch/record/2649523
Descripción
Sumario:We reconsider the issue of whether scalar-tensor theories can admit stable wormhole configurations supported by a non-trivial radial profile for the scalar field. Using a recently proposed effective theory for perturbations around static, spherically symmetric backgrounds, we show that scalar-tensor theories of “beyond Horndeski” type can have wormhole solutions that are free of ghost and gradient instabilities. Such solutions are instead forbidden within the more restrictive “Horndeski” class of theories.

Ejemplares similares