论文标题
在Starobinsky通货膨胀模型中预热期间引力波的产生
Production of gravitational waves during preheating in the Starobinsky inflationary model
论文作者
论文摘要
在本文中，通过晶格模拟研究了Starobinsky模型中GWS在Starobinsky模型中的预热过程中的产生。我们发现，随着耦合参数的绝对值$ $ξ$的增加，GW频谱$ω_ {\ rm GW} $生长很快。这是因为随着$ |ξ| $的增加，共振频带变得宽泛。当$ξ<0 $时，一旦通货膨胀结束，$ω_{\ rm gw} $就会开始增长，而增长的速度比$ξ> 0 $更快。 $ω_ {\ rm gw} $达到$ξ= -20 $（$ξ= 42 $的最大值$ξ= 42 $），然后随着轻微的振荡而减小。此外，我们发现在预热时代生产的GWS满足了普朗克和下一代CMB实验的限制。
The production of GWs during preheating in the Starobinsky model with a nonminimally coupled auxiliary scalar field is studied through the lattice simulation in this paper. We find that the GW spectrum $Ω_{\rm gw}$ grows fast with the increase of the absolute value of coupling parameter $ξ$. This is because the resonant bands become broad with the increase of $|ξ|$. When $ξ<0$, $Ω_{\rm gw}$ begins to grow once the inflation ends and grows faster than the case of $ξ>0$. $Ω_{\rm gw}$ reaches the maximum at $ξ=-20$ ($ξ=42$ for the case $ξ>0$) and then decreases with slight oscillation. Furthermore we find that the GWs produced in the era of preheating satisfy the limits from the Planck and next-generation CMB experiments.
