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.

中文翻译：

---

重整化组运行引起的宇宙膨胀

作为对宇宙学标准模型的可行候选者的贡献，我们在这里表明，暴胀前的量子涨落可以为暴胀场长期寻求的初始条件提供一个场景。我们的提议基于这样一个假设：在非常高的能量（高于膨胀的能量标度）时，场的真空期望值 (VeV) 被困在一个虚假的真空中，然后，由于重整化组 (RG) 运行，电位开始趋于低能量，最终趋于凸面，从而使场滚落到真正的真空。我们认为，所提出的机制应该适用于具有多个凹区的大类通胀潜力。我们的发现支持混沌的粒子物理学起源，大场暴胀模型，因为我们消除了 GUT 尺度上大场波动的需要。在我们的分析中，我们提供了一个关于这种暴胀潜力的具体例子，其参数可以调整以准确地再现现有的宇宙学数据。