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arXiv 1002.4488gr-qc
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Gauss-Bonnet引力下具有理想流体的平坦(4+1)维宇宙模型的新特征

New features of flat (4+1)-dimensional cosmological model with a perfect fluid in Gauss-Bonnet gravity

I. V. Kirnos, S. A. Pavluchenko, A. V. Toporensky

摘要:

本文研究了在高斯-邦尼引力中存在理想流体物质的平坦多维宇宙模型。我们发现解析新的固定制度(这些结果是有效的,为任意数量的空间维度),并研究了它们的稳定性,通过在4+1维的情况下的数值配方。在附近的固定制度,我们发现了另一个非奇异的制度,似乎是周期性的数字。最后,我们证明了物质以完美流体的形式存在解除了先前发现的4+1维模型动力学的一些约束。

英文摘要:

We investigated a flat multidimensional cosmological model in Gauss-Bonnet gravity in presence of a matter in form of perfect fluid. We found analytically new stationary regimes (these results are valid for arbitrary number of spatial dimensions) and studied their stability by means of numerical recipes in 4+1-dimensional case. In the vicinity of the stationary regime we discovered numerically another non-singular regime which appears to be periodical. Finally, we demonstrated that the presence of matter in form of a perfect fluid lifts some constraints on the dynamics of the 4+1-dimensional model which have been found earlier.

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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