Abstract
We give a scheme to geometrize the partial entanglement entropy (PEE) for holographic CFT in the context of AdS/CFT. More explicitly, given a point x we geometrize the two-point PEEs between x and any other points in terms of the bulk geodesics connecting these two points. We refer to these geodesics as the PEE threads, which can be naturally regarded as the integral curves of a divergenceless vector field \( {V}_{\textbf{x}}^{\mu } \), which we call PEE thread flow. The norm of \( {V}_{\textbf{x}}^{\mu } \) that characterizes the density of the PEE threads can be determined by some physical requirements of the PEE. We show that, for any static interval or spherical region A, a unique bit thread configuration can be generated from the PEE thread configuration determined by the state. Hence, the non-intrinsic bit threads are emergent from the intrinsic PEE threads. For static disconnected intervals, the vector fields describing a divergenceless flow is no longer suitable to reproduce the RT formula. We weight a PEE thread with the number of times it intersects with any homologous surface. Instead, the RT formula is perfectly reformulated by the minimization of the summation of PEE threads with all possible assignment of weights.
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Acknowledgments
J. Lin is supported by the National Natural Science Foundation of China under Grant No.12247117, No.12247103 and No.12047502. Y. Lu is supported by the National Natural Science Foundation of China under Grant No.12247161, the NSFC Research Fund for International Scientists (Grant No.12250410250) and China Postdoctoral Science Foundation under Grant No.2022TQ0140.
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Lin, J., Lu, Y. & Wen, Q. Geometrizing the partial entanglement entropy: from PEE threads to bit threads. J. High Energ. Phys. 2024, 191 (2024). https://doi.org/10.1007/JHEP02(2024)191
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DOI: https://doi.org/10.1007/JHEP02(2024)191