论文标题
温暖通货膨胀的非高斯形状
Shapes of non-Gaussianity in warm inflation
论文作者
论文摘要
最近已提出Sphaleron加热作为一种机制，即当Aftraton是与纯Yang-Mills耦合时，可以实现温暖的通货膨胀。加热的结果是，充气方程中有一个摩擦系数的$γ\ propto t^3 $，并且对宇宙学波动有热贡献。在不了解流口潜力的情况下，非高斯是寻找该模型签名的最有前途的方式。在Bastero-Gil，Berera，Moss和Ramos的早期作品的基础上，我们计算标量三分相关功能，并指出挤压和折叠限制中的一些不同特征。作为一种检测策略，我们表明等边模板和一个新模板的组合具有较大的重叠，非高斯的形状与$ 0.01 \leqγ/h \ leq 1000 $的范围内，并且在此范围内$ 0.7 <| f _ {\ rm nl} | <50 $。
Sphaleron heating has been recently proposed as a mechanism to realize warm inflation when inflaton is an axion coupled to pure Yang-Mills. As a result of heating, there is a friction coefficient $γ\propto T^3$ in the equation of motion for the inflaton, and a thermal contribution to cosmological fluctuations. Without the knowledge of the inflaton potential, non-Gaussianity is the most promising way of searching for the signatures of this model. Building on an earlier work by Bastero-Gil, Berera, Moss and Ramos, we compute the scalar three-point correlation function and point out some distinct features in the squeezed and folded limits. As a detection strategy, we show that the combination of the equilateral template and one new template has a large overlap with the shape of non-Gaussianity over the range $0.01 \leqγ/H\leq 1000$, and in this range $0.7 <|f_{\rm NL}| < 50$.
