We revisit two-field hybrid inflation as an effective field theory for low-scale inflation with sub-Planckian scalar field ranges. We focus on a prototype model by Stewart because it allows for a red spectral tilt, which still fits the current data. We describe the constraints on this model imposed by current CMB measurements. We then explore the stability of this model to quantum corrections. We find that for relevant, marginal, and at least a finite set of irrelevant operators, some additional mechanism is required to render the model stable to corrections from both quantum field theory and quantum gravity. We outline a possible mechanism by realizing the scalars as compact axions dual to massive 4-form field strengths, and outline how natural hybrid inflation may be supported by strong dynamics in the dualtheory.

我们将两场混合式通货膨胀作为一种有效的场理论，以亚普朗克标量场范围进行小规模通货膨胀。我们将重点放在Stewart的原型模型上，因为它允许红色光谱倾斜，但仍然适合当前数据。我们描述了当前CMB测量对该模型施加的约束。然后，我们探索该模型对量子校正的稳定性。我们发现，对于相关的，边际的，至少是有限的一组不相关的算子，需要一些附加的机制来使模型稳定，以适应来自量子场论和量子引力的修正。我们概述了通过将标量实现为紧凑的轴对大规模4形式场强的对偶，并概述了一种可能的机制，并概述了对偶理论中强大的动力学如何支持自然混合膨胀。