论文标题
（p）在$α$ aftractor模型中重新加热和重力波
(P)reheating and gravitational waves in $α$-attractor models
论文作者
论文摘要
我们研究了$α$ - 吸收器T型通货膨胀的通货膨胀后进化。我们将这些模型中存在的两个标量字段的动力学视为：反气泡和观众，作为负场空间曲率可能导致观众的几何不稳定。我们使用针对这些模型进行优化的专用数值代码执行最新的晶格模拟。我们证实了早期的发现，即观众场的扰动比充气场的扰动更加不稳定，因此，预热早期阶段的动力学主要由观众扰动的演变所支配。我们还计算出源自标量波动的重力波的光谱，以确定$α$ - 吸引者t型t型是否可以通过当前的宇宙学观察结果来限制甚至排除，而不是直接搜索引力波。
We study post-inflationary evolution in $α$-attractor T-models of inflation. We consider the dynamics of both scalar fields present in these models: the inflaton and the spectator, as a negative field-space curvature may lead to geometrical destabilization of the spectator. We perform state-of-the-art lattice simulations with a dedicated numerical code optimized for those models. We corroborate earlier findings that the perturbations of the spectator field are much more unstable than the perturbations of the inflaton field, so the dynamics of early stages of preheating is dominated by the evolution of spectator perturbations. We also calculate the spectrum of gravitational waves originating from scalar fluctuations in order to determine if the $α$-attractor T-models can be constrained or even ruled out by present cosmological observations, but not by direct searches of gravitational waves.
