标题： 全息术与 Karch-Randall 胚胎世界中的因果性 显示英文标题

标题： Holography and Causality in the Karch-Randall Braneworld

摘要： 有人认为，在Karch-Randall（KR）胚膜世界存在测地线捷径，即使引力关闭的情况下，也排除了低能中间理论的可能性。我们通过研究两个对称放置的KR胚膜的具体例子来探讨这个问题。我们发现，存在与全息中间描述一致的物质场量子化方法。在我们的模型中，不存在因果性破坏。我们利用这个例子来研究全息测地线捷径可能带来的影响。我们发现，两胚膜之间的相关性或纠缠性可能会随着额外维度几何结构的变化而增强，这种增强直接相关。当低能模式和高能模式之间存在相互作用时，这可能会影响低能区域。我们的模型明确指出，任何可能的因果性破坏只能来源于紫外区域。无论是否进行量子化，中间描述都应该作为一个有效场论（EFT）有效。 显示英文摘要

摘要： It has been argued that the existence of a geodesic shortcut in the Karch-Randall (KR) braneworld rules out the possibility for a low-energy intermediate theory, even when gravity is turned off. We study this problem in an explicit example with two symmetrically placed KR branes. We find that there can be a consistent quantization of bulk matter fields with a holographic intermediate description. In our model, there is no causality violation. We use this example to study potential implications of the bulk geodesic shortcut. We find that there are possible enhancements of the correlation or entanglement between the two branes that is directly correlated with the extra-dimensional geometry. This could affect the low-energy regime when there are interactions between low and high energy modes. Our model makes it clear that any possible causality violation can only arise from the UV. Independently of the quantization, an intermediate description should be valid as an EFT.