论文标题
谐波混合膨胀
Harmonic Hybrid Inflation
论文作者
论文摘要
我们提出了一种使用两个纯粹非扰动产生的标量电势的轴心场实现杂种膨胀的机制。标量电势的结构受轴离散的移位对称性的高度限制。我们表明，在广泛的初始条件下，谐波混合通货膨胀会产生观察性的慢速通胀。这是可能的，在容纳某些有利于约束的UV参数的同时，分别在Axion期间和慢速场范围内，有利于约束的$ f \ simsim m _ {\ rm p} $和$ δϕ_ {60} \ sillsim m _ {\ rm p} $。我们讨论受控的$ \ Mathbb {z} _2 $ - 对立轴真空的破坏，以避免宇宙域壁问题。包括$ \ mathbb {z} _2 $ - 对称的最小形式，分解为最小调谐的设置导致预测原始张量模式，其张力量比比例为$ 10^{ - 4} \ sillesim r \ \ sillsim r \\ sime r \\ simsim 0.01 $，直接访问comcycomcycmb，最后，我们概述了在IIB字符串理论中实现谐波混合通货膨胀的几种途径。
We present a mechanism for realizing hybrid inflation using two axion fields with a purely non-perturbatively generated scalar potential. The structure of scalar potential is highly constrained by the discrete shift symmetries of the axions. We show that harmonic hybrid inflation generates observationally viable slow-roll inflation for a wide range of initial conditions. This is possible while accommodating certain UV arguments favoring constraints $f\lesssim M_{\rm P}$ and $Δϕ_{60}\lesssim M_{\rm P}$ on the axion periodicity and slow-roll field range, respectively. We discuss controlled $\mathbb{Z}_2$-symmetry breaking of the adjacent axion vacua as a means of avoiding cosmological domain wall problems. Including a minimal form of $\mathbb{Z}_2$-symmetry breaking into the minimally tuned setup leads to a prediction of primordial tensor modes with the tensor-to-scalar ratio in the range $10^{-4}\lesssim r \lesssim 0.01$, directly accessible to upcoming CMB observations. Finally, we outline several avenues towards realizing harmonic hybrid inflation in type IIB string theory.
