We study an inflation model with a flat scalar potential supported by observations and find that slow-roll inflation can emerge after a quasicyclic phase of the Universe, where it undergoes repeated expansions and contractions for a finite time period. The initial conditions and the positive spatial curvature required for such nontrivial dynamics align with the quantum creation of the Universe. The key ingredients that trigger inflation are dissipative interactions of the inflaton, which are necessary to reheat the Universe after inflation and thus give us an observational handle on preinflationary physics. Our discovery implies that inflation occurs more robustly after the creation.

中文翻译：

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暴胀宇宙的耗散起源

我们研究了由观测结果支持的具有平坦标量势的暴胀模型，发现在宇宙的准循环阶段之后可能会出现慢滚暴胀，在准循环阶段宇宙会在有限的时间内经历反复的膨胀和收缩。这种非平凡动力学所需的初始条件和正空间曲率与宇宙的量子创造一致。引发暴胀的关键因素是暴胀子的耗散相互作用，这是暴胀后重新加热宇宙所必需的，从而为我们提供了暴胀前物理学的观测手段。我们的发现意味着，宇宙诞生后，通货膨胀会更加剧烈地发生。