Covariant Galileon
Centre National de la Recherche Scientifique · Université Paris Cité · +5 more institutions
Abstract
We consider the recently introduced ``Galileon'' field in a dynamical spacetime. When the Galileon is assumed to be minimally coupled to the metric, we underline that both field equations of the Galileon and the metric involve up to third-order derivatives. We show that a unique nonminimal coupling of the Galileon to curvature eliminates all higher derivatives in all field equations, hence yielding second-order equations, without any extra propagating degree of freedom. The resulting theory breaks the generalized ``Galilean'' invariance of the original model.
Citation impact
- FWCI
- 29.85
- Percentile
- 100%
- References
- 15
Authors
3- CDCédric DeffayetCorresponding
Centre National de la Recherche Scientifique, Université Paris Cité, Laboratoire AstroParticule et Cosmologie, Commissariat à l'Énergie Atomique et aux Énergies Alternatives
- GEGilles Esposito-Farèse
Sorbonne Université, Université Paris Cité, Institut d'Astrophysique de Paris, Laboratoire AstroParticule et Cosmologie, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, Centre National de la Recherche Scientifique
- AVAlexander Vikman
Commissariat à l'Énergie Atomique et aux Énergies Alternatives, New York University, Laboratoire AstroParticule et Cosmologie, Université Paris Cité, Centre National de la Recherche Scientifique
Topics & keywords
- Physics
- Curvature
- Covariant transformation
- Metric (unit)
- Spacetime
- Theoretical physics
- Mathematical physics
- Classical mechanics
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