标题： 引力再加热 显示英文标题

标题： Gravitational reheating

摘要： 由于缺乏观测证据，我们对再加热阶段的理解还不完整。 除了宇宙学上的意义外，再加热过程在粒子物理学和暴胀模型构建中也应发挥至关重要的作用。 传统上，再加热动力学通过假设暴胀子场与子场之间存在任意耦合来建模。 这种方法由于其任意的耦合而缺乏可靠的宇宙学预测，并且难以通过观测验证。 本文提出了一种最小化再加热情景，其中暴胀子场仅通过引力与所有子场耦合。 除了成功实现宇宙再加热外，该情景还对原初引力波谱提出了强有力的宇宙学预测，并排除了许多与普朗克数据一致的暗物质和暴胀模型。 显示英文摘要

摘要： Our present understanding of the reheating phase is incomplete due to a lack of observations. Apart from its cosmological implications, the reheating should play a vital role in particle physics and inflation model building. Conventionally reheating dynamics are modeled by invoking arbitrary coupling among the inflaton and daughter fields. Such an approach lacks robust cosmological predictions due to its arbitrary couplings and is difficult to verify through observation. In this paper, we propose a minimal reheating scenario where the inflaton is coupled with all the daughter fields only gravitationally. Besides being successful in reheating the Universe, the scenario offers a strong cosmological prediction of the primordial gravitational wave spectrum and discards a large number of possible models of dark matter and inflation that are otherwise consistent with Planck.