Is the trans-Planckian censorship a swampland conjecture?
Is the trans-Planckian censorship a swampland conjecture?
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跨普朗克审查制度是沼泽地猜想吗？
DOI：
10.1103/physrevd.101.046022
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发表时间：
2020
影响因子：
5
通讯作者：
Yamazaki Masahito
中科院分区：
文献类型：
--
作者：
Saito Ryo;Shirai Satoshi;Yamazaki Masahito
在宇宙加速膨胀期间，亚普朗克尺寸的量子涨落可以延伸到视界之外，并被视为有效的经典。最近，人们已经证实，这种跨普朗克模式的视界穿越在量子引力理论中从未发生过（trans-Planckian censorship猜想，TCC）。我们指出了这个猜想的几个概念问题，它本身就是对理论中可能方案的限制的陈述：相比之下，标准的沼泽地猜想是对量子引力景观中可能理论的限制。我们强调沼泽地普遍性的概念，即，沼泽地猜想限制了在给定的有效场论中的任何可能的情况。为了清楚地说明这些问题，我们介绍了几个版本的猜想，其中TCC条件施加不同的情况下，在一个给定的理论实现。我们指出，这些不同版本的猜想导致了可观察到的差异：另一个宇宙中的TCC破坏可以排除一个理论，而这种景观的减少限制了我们宇宙中可能的预测。我们的分析提出了一个问题，即trans-Planckian审查猜想是否可以被看作是一个关于UV完成存在的沼泽地猜想。
During an accelerated expansion of the Universe, quantum fluctuations of sub-Planckian size can be stretched outside the horizon and be regarded effectively classical. Recently, it has been conjectured that such horizon-crossing of trans-Planckian modes never happens inside theories of quantum gravity (the trans-Planckian censorship conjecture, TCC). We point out several conceptual problems of this conjecture, which is in itself formulated as a statement on the restriction of possible scenarios in a theory: by contrast a standard swampland conjecture is a restriction of possible theories in the landscape of the quantum gravity. We emphasize the concept of swampland universality, i.e., that a swampland conjecture constrains any possible scenario in a given effective field theory. In order to illustrate the problems clearly we introduce several versions of the conjecture, where the TCC condition is imposed differently to scenarios realizable in a given theory. We point out that these different versions of the conjecture lead to observable differences: a TCC violation in another Universe can exclude a theory, and such reduction of the landscape restricts possible predictions in our Universe. Our analysis raises the question of whether or not the trans-Planckian censorship conjecture can be regarded as a swampland conjecture concerning the existence of UV completion.