论文标题
可观察到的通货膨胀的重力波约束
Gravitational wave constraints on the observable inflation
论文作者
论文摘要
早期宇宙中产生的引力波（GW）有助于相对论的自由度的数量，$ n _ {\ rm eff} $，在大爆炸核合成（BBN）期间。通过在$ n _ {\ rm eff} $上使用约束，我们对当今最大可观察到的量表的地平线出口和通货膨胀的结束介绍了一个新的界限。我们讨论对通货膨胀模型的含义，并展示新约束如何影响模型选择。我们还讨论了当前和计划中的GW观测值（例如Ligo和Lisa）的敏感性，并表明它们可以施加的约束总是比BBN结合的严格程度不那么严格。
Gravitational waves (GW) produced in the early Universe contribute to the number of relativistic degrees of freedom, $N_{\rm eff}$, during Big Bang Nucleosynthesis (BBN). By using the constraints on $N_{\rm eff}$, we present a new bound on how much the Universe could have expanded between horizon exit of the largest observable scales today and the end of inflation. We discuss the implications on inflationary models and show how the new constraints affect model selection. We also discuss the sensitivities of the current and planned GW observatories such as LIGO and LISA, and show that the constraints they could impose are always less stringent than the BBN bound.
