论文标题
温暖辅助自然通货膨胀
Warm-assisted natural inflation
论文作者
论文摘要
我们认为，在温暖的通货膨胀框架中，自然通胀依赖温度依赖性耗散系数$γ\ propto t^3 $。自然通货膨胀率可以与Planck 2018结果兼容，并提供如此热的援助。由于没有对耗散效应的大小的先验假设，我们发现普朗克的结果更喜欢我们的基准标准尺度的弱耗散制度$ f = 5 m _ {\ rm pl} $，它在冷案中的$2σ$区域之外。通货膨胀始于寒冷的状态，并随着越来越多的热波动的发展而发展，在通货膨胀结束之前，量子波动占主导地位。观察到的光谱倾斜在模型的参数空间上施加了严格的约束。我们发现$ f <1 m _ {\ rm pl} $被排除在外。还讨论了这种耗散系数的可能起源，从轴突样耦合到衡量场和模型的测试。
We consider natural inflation in a warm inflation framework with a temperature-dependent dissipative coefficient $Γ\propto T^3$. Natural inflation can be compatible with the Planck 2018 results with such warm assistance. With no a priori assumptions on the dissipative effect's magnitude, we find that the Planck results prefer a weak dissipative regime for our benchmark scale $f=5 M_{\rm pl}$, which lies outside the $2σ$ region in the cold case. The inflation starts in the cold regime and evolves with a growing thermal fluctuation that dominates over quantum fluctuation before the end of the inflation. The observed spectral tilt puts stringent constraints on the model's parameter space. We find that $f< 1 M_{\rm pl}$ is excluded. A possible origin of such dissipative coefficient from axion-like coupling to gauge fields and tests of the model are also discussed.
