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arXiv 0910.5474hep-thastro-ph.COgr-qc
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Dirichlet边界条件下的质量引力

Massive gravity from Dirichlet boundary conditions

Claudia de Rham

摘要:

我们提出了一个明确的非线性实现的大质量引力,它依赖于引入一个虚假的紧凑额外的维度,我们施加半纽曼和半狄利克雷边界条件。在线性化的水平上,我们恢复了预期的引力交换振幅两个源介导的一个大规模的Fierz-Pauli自旋-2场,而立方相互作用在额外的螺旋度-0模式产生预期的Vainsthein机制。我们还表明,这个框架可以容纳一个平坦的四维几何的存在下,一个宇宙学常数,把这个框架的一个良好的基础上的退化的研究。

英文摘要:

We propose an explicit non-linear realization of massive gravity, which relies on the introduction of a spurious compact extra dimension, on which we impose half-Newmann and half-Dirichlet boundary conditions. At the linearized level, we recover the expected gravitational exchange amplitude between two sources mediated by a massive Fierz-Pauli spin-2 field, while cubic interactions in the additional helicity-0 mode give rise to the expected Vainsthein mechanism. We also show that this framework can accommodate for a flat four-dimensional geometry in the presence of a cosmological constant, putting this framework on a good footing for the study of degravitation.

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