arXiv 1206.21922012-06gr-qcastro-ph.COhep-th

膜上暗能量模型的状态方程形式和膜宇宙的未来

Equation-of-state formalism for dark energy models on the brane and the future of brane universes

Artyom V. Astashenok, Emilio Elizalde, Sergei D. Odintsov, Artyom V. Yurov

备注：: 13 pages, more extense discussion, references added
DOI：: 10.1140/epjc/s10052-012-2260-2

摘要：

膜暗能量宇宙学，导致我们的宇宙的各种可能的演化，进行了调查。讨论表明，虽然目前所有这些模型都可以任意接近标准的$Λ$ CDM宇宙学，但它们未来的演化可能会非常不同，甚至以多种方式随时间而发散。这包括渐进的de-Sitter演化，小撕裂与解散的约束结构，和各种可能的奇点，如大撕裂，突然的未来奇点（II型），III型和IV型的情况。具体来说，一些有趣的效果来自膜张力进行了研究。它表明，特别是，小撕裂发生在膜模型比通常的FRW宇宙学。在渐近deSitter机制中，膜张力的影响导致有效宇宙学常数的值偏离对应于普通暗能量的值。因此，加速膨胀产生的惯性力的值可以大大超过普通宇宙学模型中相应的惯性力。

英文摘要：

Brane dark energy cosmologies, leading to various possible evolutions of our universe, are investigated. The discussion shows that while all these models can be made arbitrarily close to the standard $Λ$CDM cosmology at present, their future evolutions can be very different, even diverge with time in a number of ways. This includes asymptotic de-Sitter evolution, Little Rip with dissolution of bound structures, and various possible singularities, as the Big Rip, a sudden future singularity (Type II), and Type III and Type IV cases. Specifically, some interesting effects coming from the brane tension are investigated. It is shown, in particular, that the Little Rip occurs faster on the brane model than in usual FRW cosmology. And in the asymptotic de-Sitter regime the influence of the brane tension leads to a deviation of the value of the effective cosmological constant from that corresponding to ordinary dark energy. As a consequence, the value of the inertial force from the accelerating expansion can greatly exceed the corresponding inertial force in ordinary cosmological models.

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