De Sitter Galileon

被引：77

作者：

Burrage, Clare ^{[1
]}

de Rham, Claudia ^{[1
]}

Heisenberg, Lavinia ^{[1
]}

机构：

[1] Univ Geneva, Dept Phys Theor, CH-1211 Geneva, Switzerland

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2011年 / 05期

关键词：

modified gravity; cosmological applications of theories with extra dimensions; GRAVITY; EQUATIONS; SPACE;

D O I：

10.1088/1475-7516/2011/05/025

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 Poincare 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.

引用

页数：14

共 61 条

[1] Modified gravity a la Galileon: Late time cosmic acceleration and observational constraints [J].