论文标题
轴 - -SU（2）膨胀的各向同性吸引溶液有多吸引人？
How attractive is the isotropic attractor solution of axion-SU(2) inflation?
论文作者
论文摘要
通货膨胀模型与轴突和SU（2）量规场的现象学成功的关键是SU（2）场的各向同性背景。先前的研究表明，这种各向同性背景是从各向异性（Bianchi I型）时空开始充气期间的吸引溶液。但是，并非所有可能的初始各向异性参数空间都被探讨了。在本文中，我们在不假设初始慢速动态的情况下探索了更通用的初始条件。我们发现一些初始各向异性参数空间不会导致各向同性背景，而是违反了缓慢的条件，从而过早终止了通货膨胀。当我们引入另一个作为充气的标量场并使Axion-SU（2）系统成为观众部门时，吸引力的盆地就会增加。因此，观众轴轴SU（2）模型在现象学上更具吸引力。
The key to the phenomenological success of inflation models with axion and SU(2) gauge fields is the isotropic background of the SU(2) field. Previous studies showed that this isotropic background is an attractor solution during inflation starting from anisotropic (Bianchi Type I) spacetime; however, not all possible initial anisotropic parameter space was explored. In this paper, we explore more generic initial conditions without assuming the initial slow-roll dynamics. We find some initial anisotropic parameter space which does not lead to the isotropic background, but to violation of slow-roll conditions, terminating inflation prematurely. The basin of attraction increases when we introduce another scalar field acting as inflaton and make the axion-SU(2) system a spectator sector. Therefore, the spectator axion-SU(2) model is phenomenologically more attractive.
