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arXiv 2602.01241hep-thgr-qcquant-ph
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黑洞内部与动态引力的量子纠错

Black Hole Interior and Quantum Error Correction with Dynamical Gravity

Center for Gravitational Physics and Quantum Information (CGPQI), Yukawa Institute for Theoretical Physics (YITP), Kyoto University(京都大学引力物理与量子信息中心(CGPQI),理论物理汤川研究所(YITP));Department of Physics, Rikkyo University(立教大学物理系)

Akihiro Miyata, Tomonori Ugajin

AI总结:

本文研究了动态引力对霍金辐射的作用,发现其反作用使互信息消失,从而解决了因果律违反的问题。

摘要:

根据岛屿公式,定义在黑洞内部的编码子空间中的信息在Page时间之后被嵌入到霍金辐射中。乍看之下,这种嵌入表明对霍金辐射的操作可能会修改编码子空间中的信息,从而可能导致因果律的显性违反。确实,在之前的基于PSSY模型的研究中,该模型仅包含引力的拓扑自由度,研究表明当误差足够大时,会出现因果律的违反,这通过非零的互信息来指示。在本文中,我们研究了动态引力也作用于霍金辐射的情况。在这种情况下,对霍金辐射的操作会在引力路径积分中出现的bulk时空上引起非平凡的反作用——这种效应在霍金辐射非引力时是不存在的。我们发现这种反作用使相关的互信息消失。这一结果表明,在具有动态引力的理论中,显性因果律的违反得到了解决。

英文摘要:

According to the island formula, information in the code subspace defined in the black hole interior is embedded in the Hawking radiation after the Page time. At first sight, this embedding suggests that operations acting on the Hawking radiation could modify the information in the code subspace, potentially leading to an apparent violation of causality. Indeed, in previous studies based on the PSSY model, which incorporates only the topological degrees of freedom of gravity, it was shown that when the error is sufficiently large, a violation of causality can arise, as indicated by a nonvanishing mutual information. In this paper, we investigate the situation in which dynamical gravity also acts on the Hawking radiation. In this case, operations on the Hawking radiation induce nontrivial backreaction on the bulk spacetime appearing in the gravitational path integral for the mutual information -- an effect that is absent when the Hawking radiation is non-gravitating. We find that this backreaction renders the relevant mutual information vanishing. This result implies that, in theories with dynamical gravity, the apparent violation of causality is resolved.

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