English

Can Galileons support Lorentzian wormholes?

High Energy Physics - Theory 2016-06-29 v3 General Relativity and Quantum Cosmology

Abstract

We discuss the possibility of constructing stable, static, spherically symmetric, asymptotically flat Lorentzian wormhole solutions in General Relativity coupled to a generalized Galileon field π\pi. Assuming that Minkowski space-time is obtained at π=0\partial \pi =0, we find that there is tension between the properties of the energy-momentum tensor required to support a wormhole (violation of average null energy conditions) and stability of the Galileon perturbations about the putative solution (absence of ghosts and gradient instabilities). In 3-dimensional space-time, this tension is strong enough to rule out wormholes with above properties. In higher dimensions, including the most physically interesting case of 4-dimensional space-time, wormholes, if any, must have fairly contrived shapes.

Keywords

Cite

@article{arxiv.1509.08808,
  title  = {Can Galileons support Lorentzian wormholes?},
  author = {V. A. Rubakov},
  journal= {arXiv preprint arXiv:1509.08808},
  year   = {2016}
}

Comments

Error corrected, results and conclusions unchanged. Journal version, to appear in Theoretical and Mathematical Physics

R2 v1 2026-06-22T11:08:18.612Z