AI 中文总结
本文分析最小暖暴涨模型的微扰耗散模式，发现其摩擦系数受红外主导，与$\alpha$线性相关，相比CS扩散项抑制更小，但慢滚效应会抑制该贡献，非局域变量时间关联是摩擦系数未被抑制的原因。
AI 中文摘要
我们对最小暖暴涨模型中的微扰耗散模式进行了分析，该模型中轴子暴胀子通过轴子-规范耦合与胶子热浴耦合。我们所考虑过程对应的摩擦系数通常由红外物理主导，其主要来源于软类空胶子的朗道阻尼和硬在壳胶子的等离子体衰变。由于这两种过程均由红外主导，摩擦系数会对非微扰磁质量标度$m_{g}^{-1} \sim (\alpha T)^{-1}$变得敏感，进而导致摩擦系数整体与$\alpha$呈线性比例关系，相比已被充分研究的陈-西蒙斯（CS）扩散项（$\propto \alpha^5$），其在$\alpha$幂次上的抑制要小得多。另一方面，由于慢滚效应，该摩擦系数的这一贡献会受到抑制。我们表明，这可被视为对一般导数耦合的局域自发CPT破坏的抑制，且非局域变量的时间关联在大时间间隔下不会衰减，这使得摩擦系数未被抑制。
英文摘要
We present an analysis of the perturbative modes of dissipation in the minimal warm inflation model where an axion-inflaton is coupled to a gluon thermal bath through the axion-gauge coupling. The corresponding friction coefficient, which generically is governed by IR physics, for the processes we consider is dominated by Landau damping of soft space-like gluons and the plasmon decay of hard on shell gluons. Since both of these processes are IR dominated, the friction coefficient becomes sensitive to the non-perturbative magnetic mass scale $m_{g}^{-1} \sim (αT)^{-1}$ which in turn leads to the friction coefficient's overall linear proportionality to $α$, which is much less suppressed in $α$ powers compared to the well understood term from Chern-Simons (CS) diffusion $(\propto α^5)$. On the other hand, this contribution to the friction coefficient is suppressed due to slow roll. We show that this can be viewed as a suppression of local spontaneous CPT violation for derivative couplings in general and that time correlations of nonlocal variables which do not fall off at large time separations are what allow an unsuppressed friction coefficient.
Comments46 pages, 4 figures
