论文标题
随机非吸引者膨胀
Stochastic non-attractor inflation
论文作者
论文摘要
我们将随机通货膨胀的形式主义扩展到使用音速$ C_S $的非吸引者通货膨胀的设置。我们获得了超级运动扰动的Langevin方程，并计算曲率扰动功率谱的随机校正。结果表明，平均E折叠和功率谱的分数随机校正在功率谱上。我们还计算了一个假设的DS空间中的边界交叉和首次击中概率，该空间具有两个边界空间。此外，计算了类似于具有较大扩散项的永恒膨胀的设置中功率谱的随机校正。
We extend the formalism of stochastic inflation to the setup of non-attractor inflation with a sound speed $c_s$. We obtain the Langevin equations for the superhorizon perturbations and calculate the stochastic corrections to curvature perturbation power spectrum. It is shown that the fractional stochastic corrections in mean number of e-folds and power spectrum are at the order of power spectrum. We also calculate the boundary crossing and the first hitting probabilities in a hypothetical dS space with two boundaries in field space. Furthermore, the stochastic corrections in power spectrum in a setup akin to eternal inflation with large diffusion term are calculated.
