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arXiv 1702.07385gr-qc
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从暴胀到最近的宇宙加速:费米子Elko场驱动宇宙的演化

From inflation to recent cosmic acceleration: The fermionic Elko field driving the evolution of the universe

S. H. Pereira, T. M. Guimarães

摘要:

在本文中,我们构建了由质量维驱动的宇宙的完整演化,一个暗旋量称为Elko,从通货膨胀开始,通过物质主导的时代,并完成与最近的加速膨胀。具有对称破缺型势的费米子Elko场的动力学可以自然而优雅地再现宇宙的所有相态。给出了Elko系统一般情况下的动力学方程和极限$H\ll m_{pl}$下的慢滚条件。对暴胀过程中的e折叠数、暴胀后的能量密度和目前的宇宙实际大小的数值分析与宇宙学的标准模型符合得很好。如果把埃尔克场看作是它的量子类似物的平均值,那么用泡利不相容原理来解释暴胀相也是可能的。

英文摘要:

In this paper we construct the complete evolution of the universe driven by the mass dimension one dark spinor called Elko, starting with inflation, passing by the matter dominated era and finishing with the recent accelerated expansion. The dynamic of the fermionic Elko field with a symmetry breaking type potential can reproduce all phases of the universe in a natural and elegant way. The dynamical equations in general case and slow roll conditions in the limit $H\ll m_{pl}$ are also presented for the Elko system. Numerical analysis for the number of e-foldings during inflation, energy density after inflation and for present time and also the actual size of the universe are in good agreement with the standard model of cosmology. An interpretation of the inflationary phase as a result of Pauli exclusion principle is also possible if the Elko field is treated as an average value of its quantum analogue.

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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