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arXiv 0708.3835gr-qc
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5D非紧非Ricci平坦Kaluza-Klein宇宙学

A 5D non compact and non Ricci flat Kaluza-Klein Cosmology

F. Darabi

摘要:

在5维非紧Kaluza-Klein宇宙学框架下提出了一个非Ricci平坦的模型宇宙。作为Robertson-Walker度规的4D部分耦合到常规的理想流体,其额外的维部分通过标量场耦合到暗压力。结果表明,如果标量场的非真空态对四维宇宙学有贡献,那么四维宇宙的早期暴胀和当前的加速都不会发生。

英文摘要:

A model universe is proposed in the framework of 5-dimensional noncompact Kaluza-Klein cosmology which is not Ricci flat. The 4D part as the Robertson-Walker metric is coupled to conventional perfect fluid, and its extra-dimensional part is coupled to a dark pressure through a scalar field. It is shown that neither early inflation nor current acceleration of the 4D universe would happen if the non-vacuum states of the scalar field would contribute to 4D cosmology.

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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