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arXiv 2606.21079hep-thgr-qc
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全息类时间纠缠熵的线性增长与Kasner指数

Linear Growth of Holographic Time-like Entanglement Entropy and Kasner exponents

Center for Joint Quantum Studies and Department of Physics, School of Science, Tianjin University(天津大学理学院物理系联合量子研究中心)

Zi-Hao Li, Run-Qiu Yang

AI总结:

采用分段极值曲面方案,研究渐近AdS黑洞中类时间纠缠熵在晚时的线性增长,发现事件视界内的临界极值曲面主导该增长,并证明真空Schwarzschild-AdS几何设定了增长率的上下界。

摘要:

全息类时间纠缠熵(TEE)将纠缠扩展到类时间边界子区域。尽管其明确的全息字典仍有争议,但一个具体提议利用分段极值曲面。在这项工作中,我们采用这一几何处方作为探索框架,在全息上研究具有类空间奇点且无内视界的渐近AdS黑洞中TEE的晚时($\tau_0\to \infty$)增长。通过假设类空间奇点附近的Kasner几何并利用零能量条件,我们解析地证明事件视界内的临界极值曲面$\mathcal{A}_c$完全支配TEE的晚时线性增长。这一结果表明TEE的晚时行为受到黑洞内部几何的严格约束。利用爱因斯坦-标量理论的数值结果,我们发现一个稳健的行为:真空Schwarzschild-AdS几何设定了实部增长率的上界和虚部增长率的下界。我们在静态平面对称情形下在主能量条件下证明了这些界,并推测在更一般情形下也应成立。

英文摘要:

The holographic time-like entanglement entropy (TEE) extends entanglement to time-like boundary subregions. While its definitive holographic dictionary remains debated, one concrete proposal utilizes piece-wise extremal surfaces. In this work, we adopt this geometric prescription as an exploratory framework to holographically investigate the late-time ($τ_0\to \infty$) growth of TEE in asymptotically AdS black holes with a space-like singularity and no inner horizon. By assuming a Kasner geometry near the space-like singularity and using the null energy condition, we analytically show that a critical extremal surface $\mathcal{A}_c$ inside the event horizon completely governs the late-time linear growth of the TEE. This result suggests that the late-time behavior of TEE is tightly constrained by the geometry of black hole interiors. While the dominant energy condition (DEC) guarantees an upper bound for the real part's growth rate, we conjecture a corresponding universal lower bound for the imaginary part. Numerical results from Einstein-scalar theory demonstrate the robustness of this bounding behavior: the vacuum Schwarzschild-AdS geometry consistently maximizes the real growth rate and minimizes the imaginary part, suggesting these bounds hold in broader holographic setups.

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