Kaluza-Klein宇宙学中的一个暗能量模型
A Dark Energy Model in Kaluza-Klein Cosmology
摘要：
在Kaluza-Klein宇宙学下，研究了具有变引力常量$G$的动力学$Λ$模型.物理特性和本模型的局限性进行了探讨和讨论。大多数解都是根据加速宇宙的观测特征找到的。有趣的是，注意到减速参数的签名翻转，并且在某些严格的条件下也可以获得宇宙的当前年龄。我们发现，没有经典的$Λ$，引力常量的时间变化是不允许的。
英文摘要：
We study a dynamic $Λ$ model with varying gravitational constant $G$ under the Kaluza-Klein cosmology. Physical features and the limitations of the present model have been explored and discussed. Solutions are found mostly in accordance with the observed features of the accelerating universe. Interestingly, signature flipping of the deceleration parameter is noticed and the present age of the Universe is also attainable under certain stringent conditions. We find that the time variation of gravitational constant is not permitted without vintage $Λ$.
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