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arXiv 1104.0155hep-thgr-qc
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德西特·加利利翁

de Sitter Galileon

Clare Burrage, Claudia de Rham, Lavinia Heisenberg

摘要:

我们推广的Galileon对称性和它的相对论性扩展到德西特背景。这是可能的,通过研究一个探针膜在一个平坦的五维散装使用德西特切片。在探测膜上诱导的广义洛夫洛克不变量具有从块体中继承的诱导庞加莱对称性,同时生活在de Sitter几何上。这些不变量的非相对论性限制自然地保持了德西特周围的广义伽利略对称性,同时没有幽灵般的病态。我们简要地评论这些模型的宇宙学和扩展的AdS对称性以及通用FRW背景。

英文摘要:

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 Poincaré 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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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