The zoo plot meets the swampland: mutual (in)consistency of single-field inflation, string conjectures, and cosmological data
The zoo plot meets the swampland: mutual (in)consistency of single-field inflation, string conjectures, and cosmological data
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DOI：
10.1088/1361-6382/ab1d87
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发表时间：
2018-08
影响因子：
3.5
通讯作者：
W. Kinney;S. Vagnozzi;L. Visinelli
中科院分区：
文献类型：
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作者：
W. Kinney;S. Vagnozzi;L. Visinelli
我们根据弦驱动的“沼泽”猜想考虑了单场膨胀，这表明具有一致UV完成性的有效标量场论必须具有场漂移，并结合足够陡峭的势。在这里，我们证明了沼泽猜想与现有的单场暴涨的观测约束不一致。聚焦于观测上看好的凹势类，我们将允许的沼泽区映射到膨胀模型的NS-r‘Zoo Plot’上，发现与Planck卫星和BICEP2/Keck阵列的一致性要求与沼泽猜想保持强烈的张力。扩展到非规范模型，如DBI通货膨胀，并不会显著削弱界限。
We consider single-field inflation in light of string-motivated ‘swampland’ conjectures suggesting that effective scalar field theories with a consistent UV completion must have field excursion , in combination with a sufficiently steep potential, . Here, we show that the swampland conjectures are inconsistent with existing observational constraints on single-field inflation. Focusing on the observationally favoured class of concave potentials, we map the allowed swampland region onto the nS-r ‘zoo plot’ of inflationary models, and find that consistency with the Planck satellite and BICEP2/Keck Array requires and , in strong tension with swampland conjectures. Extension to non-canonical models such as DBI Inflation does not significantly weaken the bound.