论文标题
通过非最少耦合观众的双重充气
Double inflation via non-minimally coupled spectator
论文作者
论文摘要
我们认为，当观众场与重力无限耦合时，可能会发生双重通胀。作为一个具体的例子，我们研究了一个两体膨胀模型，其中初始观众场是非最小耦合到重力的，而初始充气场则最小耦合。非最小耦合导致观众场的生长，而参数空间的重要区域又驱动了通货膨胀的第二阶段。源自观众场源绝热源的异性外观波动，因此，即使初始的Forfton场是最小的耦合到重力，但观众的非最小耦合也可以改变光谱指数的通货膨胀预测和张量尺度的比率。我们明确表明，通过引入观众非最小耦合，二次混沌通胀可能变得可行。
We argue that double inflation may occur when a spectator field is non-minimally coupled to gravity. As a concrete example, we study a two-field inflationary model where the initial spectator field is non-minimally coupled to gravity while the initial inflaton field is minimally coupled. The non-minimal coupling results in the growth of the spectator field which, in turn, drives the second stage of inflation in a significant region of parameter space. The isocurvature fluctuations originating from the spectator field source adiabatic ones, and hence the spectator non-minimal coupling can modify the inflationary predictions for the spectral index and the tensor-to-scalar ratio even though the initial inflaton field is minimally coupled to gravity. We explicitly show that quadratic chaotic inflation can become viable by the introduction of the spectator non-minimal coupling.
