On the de Sitter swampland criterion
On the de Sitter swampland criterion
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DOI：
10.1016/j.physletb.2018.09.022
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发表时间：
2018-10-10
影响因子：
4.4
通讯作者：
Andriot, David
中科院分区：
文献类型：
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作者：
Andriot, David
最近提出了一个新的沼泽地标准。因此，在量子引力的低能量有效理论中，它禁止德西特解的存在。然而，存在十维（10d） II型超引力的经典de Sitter解，尽管它们是不稳定的。乍看之下，这是与标准相矛盾的。除了对这些解决方案的有效性可能存在的怀疑之外，我们对这个明显的难题提出了两个答案。第一种可能性是，已知的10d解总是表现出比Kaluza-Klein尺度更高的能级，正如我们所争论的那样。相应的四维低能量有效理论将不同于通常的一致截断，并且正如我们所解释的那样，将不承认德西特解。这将使这些10d德西特解的存在与4d准则相协调。第二种可能性，也就是我们提出的，是制定一个完善的沼泽地标准。它禁止同时具有德西特解的存在性和稳定性，而不稳定解仍然是允许的。(c) 2018年提交人。Elsevier B.V.出版
A new swampland criterion has recently been proposed. As a consequence, it forbids the existence of de Sitter solutions in a low energy effective theory of a quantum gravity. However, there exist classical de Sitter solutions of ten-dimensional (10d) type II supergravities, even though they are unstable. This appears at first sight in contradiction with the criterion. Beyond possible doubts on the validity of these solutions, we propose two answers to this apparent puzzle. A first possibility is that the known 10d solutions always exhibit an energy scale of order or higher than a Kaluza-Klein scale, as we argue. A corresponding 4d low energy effective theory would then differ from the usual consistent truncations, and as we explain, would not admit a de Sitter solution. This would reconcile the existence of these 10d de Sitter solutions with the 4d criterion. A second, alternative possibility is to have a refined swampland criterion, that we propose. It forbids to have both the existence and the stability of a de Sitter solution, while unstable solutions are still allowed. (c) 2018 The Author. Published by Elsevier B.V.