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arXiv 2203.03096hep-th
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宇宙学的自下而上全息模型

Bottom-up holographic models for cosmology

Chris Waddell

摘要:

在这篇笔记中,我们研究了arXiv:1810.10601中介绍的宇宙学自下而上全息方法的一些简单概括。我们的模型利用Karch/Randall/Takayanagi的引力对偶的边界共形场论,涉及纯AdS引力和世界末日膜。根据arXiv:2102.05057中的建议,我们考虑在体中具有附加界面膜的模型。我们发现,解决方案与可行的宇宙学解释存在,只有当我们的模型进一步推广,例如,包括一个爱因斯坦-希尔伯特项在ETW膜行动。从有效理论的角度讨论了这些模型的物理有效性。

英文摘要:

In this note, we investigate some simple generalizations of a bottom-up holographic approach to cosmology introduced in arXiv:1810.10601. Our models utilize the Karch/Randall/Takayanagi ansatz for the gravitational dual of a boundary conformal field theory, involving pure AdS gravity and an end-of-the-world brane. Following a suggestion made in arXiv:2102.05057, we consider models with an additional interface brane in the bulk. We find that solutions with a viable cosmological interpretation exist only if our model is further generalized, for example by including an Einstein-Hilbert term in the ETW brane action. The physical validity of such models is discussed from the perspective of the effective theory.

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