Towards wormhole beyond Horndeski
arXiv:1811.05832 · doi:10.1051/epjconf/201819107014
Abstract
We address the issue of whether a no-go theorem for static, spherically symmetric wormholes, proven in Horndeski theories, can be circumvented by going beyond Horndeski. We show that the ghost instabilities which are at the heart of the no-go theorem, can indeed be avoided. The wormhole solutions with the latter property are, however, strongly fine tuned, and hence it is likely that they are unstable. Furthermore, it remains unclear whether these solutions have other pathologies, like gradient instabilities along angular and radial directions.
7 pages, 6 figures, Proceedings of Quarks 2018
References in corpus (11)
- Healthy theories beyond Horndeski
- Galilean Genesis: an alternative to inflation
- Generic instabilities of non-singular cosmologies in Horndeski theory: a no-go theorem
- The Effective Field Theory of nonsingular cosmology
- Generalized Galileons: instabilities of bouncing and Genesis cosmologies and modified Genesis
- Stability of Geodesically Complete Cosmologies
- A covariant Lagrangian for stable nonsingular bounce
- Cosmological bounce and Genesis beyond Horndeski
- Generalized multi-Galileons, covariantized new terms, and the no-go theorem for non-singular cosmologies
- Cosmological bounces and Lorentzian wormholes in Galileon theories with an extra scalar field
- No static sphericaly symmetric wormholes in Horndeski theory
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- Superluminality in DHOST theory with extra scalar