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arXiv 0710.0214gr-qchep-th
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DGP膜宇宙学中的曲率修正

Curvature corrections in DGP brane cosmology

K. Atazadeh, H. R. Sepangi

摘要:

我们考虑一个DGP启发膜的情况下,膜上的行动是由里奇标量,${\cal L}(R)$的功能增强。宇宙学的影响,这种情况下需要检查$R^{n}$和宇宙膨胀与幂律加速度是一致的。结果表明,两类解决方案存在通常的FRW度量和小哈勃半径。当哈勃半径变大时,我们要么过渡到完全的5D状态,要么过渡到自暴胀解,后者产生后期加速膨胀,使得半径成为$n$的函数。

英文摘要:

We consider a DGP inspired brane scenario where the action on the brane is augmented by a function of the Ricci scalar, ${\cal L}(R)$. The cosmological implications that such a scenario entails are examined for $R^{n}$ and shown to be consistent with a universe expanding with power-law acceleration. It is shown that two classes of solutions exist for the usual FRW metric and small Hubble radii. When the Hubble radius becomes larger, we either have a transition to a fully 5D regime or to a self-inflationary solution which produces a late accelerated expansion such that the radius becomes a function of $n$.

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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