Hybrid cosmological attractors

Hybrid cosmological attractors
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混合宇宙吸引子

DOI:
10.1103/physrevd.106.023522
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发表时间:
2022
期刊:
影响因子:
5
通讯作者:
Linde, Andrei
Linde, Andrei
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Kallosh, Renata;Linde, Andrei

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我们构建吸引子版本的混合通货膨胀模型。在这些模型中,暴胀子场的势被第二场的势抬高。这种上升的结束是由于相对于场的快子不稳定性,它出现在比某个临界值小的时候。在大范围内,这些模型具有标准的普适吸引子预测。特别是对于指数吸引子。然而,在某些特殊情况下,只有在地平线之外才能达到最大限度,因为。这可能会改变对宇宙学观测的预测。对于任何固定的,在大隆起的极限,或在大的极限,我们找到另一个吸引子预测,。通过改变参数和,可以在两个吸引子预测和之间连续插值。这提供了显著的灵活性,鉴于宇宙学数据的数量和精度迅速增长,这是非常受欢迎的。我们的主要结果并不特定于混合通货膨胀模型。相反,它对任何暴胀模型都是通用的,在这些模型中,由于某种原因,暴胀势能被提升,暴胀过早结束。
We construct-attractor versions of hybrid inflation models. In these models, the potential of the inflaton fieldis uplifted by the potential of the second field. This uplifting ends due to a tachyonic instability with respect to the field, which appears whenbecomes smaller than some critical value. In the largelimit, these models have the standard universal-attractor predictions. In particular,for the exponential attractors. However, in some special cases, the largelimit is reached only beyond the horizon, for. This may change predictions for the cosmological observations. For any fixed, in the limit of large uplift, or in the limit of large, we find another attractor prediction,. By changing the parameters,and, one can continuously interpolate between the two attractor predictionsand. This provides significant flexibility, which can be very welcome in view of the rapidly growing amount and precision of the cosmological data. Our main result is not specific to the hybrid inflation models. Rather, it is generic to any inflationary models, where the inflaton potential, for some reason, is uplifted, and inflation ends prematurely.
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期刊:
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影响因子: 6.4
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天空中的埃舍尔
DOI: 10.1016/j.crhy.2015.07.004
发表时间: 2015
影响因子: 1.4
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通讯作者: Andrei Linde