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arXiv · 1104.0155

de Sitter Galileon

Clare Burrage·Claudia de Rham·Lavinia Heisenberg
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Abstract

We generalize the Galileon symmetry and its relativistic extension to a de Sitter background. This is made possible by studying a probe-brane in a flat five-dimensional bulk using a de Sitter slicing. The generalized Lovelock invariants induced on the probe brane enjoy the induced Poincar\'e symmetry inherited from the bulk, while living on a de Sitter geometry. The non-relativistic limit of these invariants naturally maintain a generalized Galileon symmetry around de Sitter while being free of ghost-like pathologies. We comment briefly on the cosmology of these models and the extension to the AdS symmetry as well as generic FRW backgrounds.

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Clare Burrage, Claudia de Rham, Lavinia Heisenberg. 2011-04-01. de Sitter Galileon. https://doi.org/10.1088/1475-7516/2011/05/025

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