Galileons from Lovelock actions

Details Galileons from Lovelock actions Galileons from Lovelock actions

2011-02-02

arxiv.org/abs/1102.0487v2

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

15 pages, some extra references

Scientific paper

We demonstrate how, for an arbitrary number of dimensions, the Galileon actions and their covariant generalizations can be obtained through a standard Kaluza-Klein compactification of higher-dimensional Lovelock gravity. In this setup, the dilaton takes on the role of the Galileon. In addition, such compactifications uncover other more general Galilean actions, producing purely second-order equations in the weak-field limit, now both for the Galileon and the metric perturbations.

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