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arXiv 0709.3543gr-qc
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从5D真空引力理论过渡到有效的4D幻影宇宙学

Passing to an effective 4D phantom cosmology from 5D vacuum theory of gravity

Jose Edgar Madriz Aguilar, Mauricio Bellini

摘要:

从五维(5D)真空引力理论出发,其中额外坐标被认为是非紧的,我们调查的可能性,诱导四维(4D)幻影的情况下,通过应用形式不变性对称变换。特别是,我们得到幻影的两个宇宙学框架的情况。在第一个框架中,我们处理一个诱导的4D deSitter膨胀和在第二个4D诱导模型的宇宙膨胀是由一个递减的宇宙学参数$Λ(t)$进行了讨论。

英文摘要:

Starting from a five-dimensional (5D) vacuum theory of gravity where the extra coordinate is considered as noncompact, we investigate the possibility of inducing four-dimensional (4D) phantom scenarios by applying form-invariance symmetry transformations. In particular we obtain phantom scenarios for two cosmological frameworks. In the first framework we deal with an induced 4D de-Sitter expansion and in the second one a 4D induced model where the expansion of the universe is dominated by a decreasing cosmological parameter $Λ(t)$ is discussed.

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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