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Stable wormholes in scalar-tensor theories

Hui, Lam
Penco, Riccardo
Santoni, Luca
Trincherini, Enrico
Published in Journal of High Energy Physics. 2019, vol. 1901, 221
Collection Open Access - SCOAP3
Abstract 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.
Keywords Classical Theories of GravityEffective Field TheoriesSpacetime Singularities
arXiv: 1811.05481
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FRANCIOLINI, Gabriele et al. Stable wormholes in scalar-tensor theories. In: Journal of High Energy Physics, 2019, vol. 1901, p. 221. doi: 10.1007/JHEP01(2019)221 https://archive-ouverte.unige.ch/unige:114709

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Deposited on : 2019-03-04

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