On the cosmological implications of the string Swampland
On the cosmological implications of the string Swampland
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DOI：
10.1016/j.physletb.2018.07.040
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发表时间：
2018-09-10
影响因子：
4.4
通讯作者：
Vafa, Cumrun
中科院分区：
文献类型：
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作者：
Agrawal, Prateek;Obied, Georges;Vafa, Cumrun
我们研究了两个提出的弦-斯旺兰判据对宇宙学的限制。这些标准涉及标量场所经过的范围的上界，以及当V>；0时垂直条形Del V-Phi垂直条形/V的下界。我们发现，通货膨胀模型通常与这两个标准相矛盾。将这些同样的标准应用于当前时代的暗能量，我们发现特定的精髓模型可以满足这些界限，同时满足当前的观测约束。假设这两个斯旺兰标准成立，我们认为宇宙将在几个哈勃时间内经历一次相变。这些标准加强了未来测量张量标量比和暗能量状态方程w的动机，以及测试暗物质的等价原理。(C)2018年提交人(S)。爱思唯尔出版公司(Elsevier B.V.)
We study constraints imposed by two proposed string Swampland criteria on cosmology. These criteria involve an upper bound on the range traversed by scalar fields as well as a lower bound on vertical bar del V-phi vertical bar/V when V > 0. We find that inflationary models are generically in tension with these two criteria. Applying these same criteria to dark energy in the present epoch, we find that specific quintessence models can satisfy these bounds and, at the same time, satisfy current observational constraints. Assuming the two Swampland criteria are valid, we argue that the universe will undergo a phase transition within a few Hubble times. These criteria sharpen the motivation for future measurements of the tensor-to-scalar ratio rand the dark energy equation of state w, and for tests of the equivalence principle for dark matter. (C) 2018 The Author(s). Published by Elsevier B.V.