具有强非测地线运动的暴胀的超非高斯性
Hyper non-Gaussianities in inflation with strongly non-geodesic motion
摘要：
最近几个将暴胀嵌入高能物理学的提议依赖于暴胀动力学，其特征在于负弯曲场空间中的强非测地线运动。这自然会导致亚哈勃尺度上的扰动的瞬时不稳定性，以及它们的指数放大。支持第一性原理数值计算，并提供了由膨胀的有效场论的分析见解，我们表明，双谱增强扁平的配置，我们认为，类似的结果适用于所有高阶关联函数。因此，这些“超非高斯性”为非标准暴胀吸引子提供了强大的模型独立约束，这些吸引子是由寻找暴胀的紫外线完成而激发的。
英文摘要：
Several recent proposals to embed inflation into high-energy physics rely on inflationary dynamics characterized by a strongly non-geodesic motion in negatively curved field space. This naturally leads to a transient instability of perturbations on sub-Hubble scales, and to their exponential amplification. Supported by first-principle numerical computations, and by the analytical insight provided by the effective field theory of inflation, we show that the bispectrum is enhanced in flattened configurations, and we argue that an analogous result holds for all higher-order correlation functions. These ``hyper non-Gaussianities'' thus provide powerful model-independent constraints on non-standard inflationary attractors motivated by the search for ultraviolet completions of inflation.
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