不排除$ϕ^4$充盈
$ϕ^4$ inflation is not excluded
摘要：
我们提出了反例的索赔，$λϕ^4$暴胀子潜力被排除在最近的宇宙学数据。要找到反例，就需要实际观察到的原始波动是在慢卷暴胀状态开始时产生的。因此，这种初始条件的设置与通常的混沌暴胀场景不同，在混沌暴胀场景中，暴胀在观测到的波动产生之前很久就开始了。“刚好够”混沌暴胀的原始功率谱以与观测一致的方式违反了标度不变性。
英文摘要：
We present counter examples to the claim that the $λϕ^4$ inflaton potential is excluded by recent cosmological data. Finding counter examples requires that the actually observed primordial fluctuations are generated at the onset of the slow-roll regime of inflation. This set up for the initial conditions is therefore different from the usual scenario of chaotic inflation where inflation starts long before the observed fluctuations are created. The primordial power spectrum of "just enough" chaotic inflation violates scale-invariance in a way consistent with observations.
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