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arXiv 1202.2677gr-qcastro-ph.HEhep-phhep-th
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具有球面紧化的正合渐近黑膜

Exact and asymptotic black branes with spherical compactification

Alexey Chopovsky, Maxim Eingorn, Alexander Zhuk

摘要:

在具有多维宇宙学常数$Λ_6$的六维Kaluza-Klein模型中,我们得到了内部空间球紧化的黑膜.该精确解的物质来源由两部分组成。首先,它是一种微调均匀的完美流体,提供了内部空间的球形紧化。第二,它是一个有引力的大质量物体,外部空间是尘埃状态方程,内部空间是张力$\hat p_1=-(1/2)\hat\varepsilon$。该溶液在存在和不存在$Λ_6$的情况下均存在。在弱场近似下,我们还得到了球紧化模型的线性化爱因斯坦方程的解。这里,引力物质源在外部空间具有尘埃状状态方程,在内部空间具有任意状态方程$\hat p_1=Ω\hat\varepsilon$。在$Λ_6>0$和$Ω\neq -1/2$的情况下,这些近似解渐近地趋向于精确黑膜解的弱场极限。精确黑膜和渐近黑膜都能满足引力实验的要求,其精度与广义相对论相同。

英文摘要:

In the six-dimensional Kaluza-Klein model with the multidimensional cosmological constant $Λ_6$, we obtain the black brane with spherical compactification of the internal space. The matter source for this exact solution consists of two parts. First, it is a fine-tuned homogeneous perfect fluid which provides spherical compactification of the internal space. Second, it is a gravitating massive body with the dustlike equation of state in the external space and tension $\hat p_1=-(1/2)\hat\varepsilon$ in the internal space. This solution exists both in the presence and absence of $Λ_6$. In the weak-field approximation, we also get solutions of the linearized Einstein equations for the model with spherical compactification. Here, the gravitating matter source has the dustlike equation of state in the external space and an arbitrary equation of state $\hat p_1=Ω\hat\varepsilon$ in the internal space. In the case $Λ_6>0$ and $Ω\neq -1/2$, these approximate solutions tend asymptotically to the weak-field limit of the exact black brane solution. Both the exact and asymptotic black branes satisfy the gravitational experiments at the same level of accuracy as general relativity.

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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