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arXiv 1801.03031gr-qc
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Jordan-Brans-Dicke宇宙学中辐射主导时期的膨胀与线性膨胀

Inflation and Linear Expansion in the Radiation Dominated era in Jordan-Brans-Dicke Cosmology

Metin Arik, Medine Ildes, Mikhail B. Sheftel

AI总结:

本文研究Jordan-Brans-Dicke宇宙学中辐射主导时期的演化,发现早期指数膨胀、晚期线性膨胀,并存在可能的刚性物质尺度不变阶段,物质引入导致减速。

摘要:

我们展示了基于Brans-Dicke-Jordan-Thirry作用量的宇宙学模型的若干特征,该作用量具有尺度不变性,且Jordan标量场具有四次势。我们表明,辐射主导时期始于一个指数膨胀的闭合宇宙,而晚期辐射主导时期则呈线性膨胀。我们发现,在这两个辐射主导时期之间可能存在一个具有刚性物质的尺度不变阶段。在线性膨胀的宇宙中引入物质会导致减速。

英文摘要:

We present several features of a cosmological model based on the Brans-Dicke-Jordan-Thirry action which is scale invariant with a quartic potential for the Jordan scalar field. We show that the radiation dominated era starts with a closed universe which expands exponentially and the late radiation dominated era expands linearly. We find that there may be a scale-invariant phase with stiff matter between these two radiation dominated eras. The introduction of matter in the linearly expanding universe causes deceleration.

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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