arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1909.00580astro-ph.COhep-th
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重整化群运行引起的宇宙暴胀

Renormalization-Group Running Induced Cosmic Inflation

I. G. Marian, N. Defenu, U. D. Jentschura, A. Trombettoni, I. Nandori

摘要:

作为宇宙学标准模型的一个可行的候选人的贡献,我们在这里表明,暴胀前的量子涨落可以提供一个长期寻求的暴胀场的初始条件的情况。我们的建议是基于这样的假设,即在非常高的能量(高于暴胀的能量标度),真空期望值(VeV)的字段被困在一个假真空,然后,由于重整化群(RG)运行,势开始平坦向低能量,最终趋于凸的一个,使字段滚下到真正的真空。我们认为,建议的机制应适用于大类的通货膨胀潜力与多个凹区。我们的研究结果有利于粒子物理学起源的混乱,大领域的通货膨胀模型,因为我们消除了需要在大统一尺度的大领域波动。在我们的分析中,我们提供了一个这样的暴胀势的具体例子,其参数可以调整,以再现现有的宇宙学数据具有良好的精度。

英文摘要:

As a contribution to a viable candidate for a standard model of cosmology, we here show that pre-inflationary quantum fluctuations can provide a scenario for the long-sought initial conditions for the inflaton field. Our proposal is based on the assumption that at very high energies (higher than the energy scale of inflation) the vacuum-expectation value (VeV) of the field is trapped in a false vacuum and then, due to renormalization-group (RG) running, the potential starts to flatten out toward low energy, eventually tending to a convex one which allows the field to roll down to the true vacuum. We argue that the proposed mechanism should apply to large classes of inflationary potentials with multiple concave regions. Our findings favor a particle physics origin of chaotic, large-field inflationary models as we eliminate the need for large field fluctuations at the GUT scale. In our analysis, we provide a specific example of such an inflationary potential, whose parameters can be tuned to reproduce the existing cosmological data with good accuracy.

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