近日，中山大学苗荣欣团队研究了AdS中的可穿越虫洞与纠缠。相关论文发表在2025年4月23日出版的《中国物理C》杂志上。

可穿越的虫洞通常违反平均零能量条件，通常需要外来物质。最近，人们发现，在平坦空间中，爱因斯坦-狄拉克-麦克斯韦理论中的非奇异物质可以实现可穿越的虫洞。研究组将讨论扩展到AdS时空，并发现了具有球形和平面拓扑的可穿越虫洞。此外，基于AdS/CFT对应关系，他们计算了虫洞两个AdS边界上条带和盘的纠缠熵。结果发现，随着子系统尺寸的增加，纠缠熵会经历相变。

附：英文原文

Title: Traversable wormholes in AdS and entanglement

Author: Hua-Chao Liu, Rong-Xin Miao

Issue&Volume: 2025-04-23

Abstract: A traversable wormhole generally violates the averaged null energy condition, typically requiring exotic matter. Recently, it was discovered that a traversable wormhole can be realized with non-exotic matter in Einstein-Dirac-Maxwell theories in flat space. This study extends the discussion to AdS spacetime and finds traversable wormholes with spherical and planar topologies. Furthermore, based on the AdS/CFT correspondence, we compute the entanglement entropy of strips and disks on the two AdS boundaries of the wormhole. We find that the entanglement entropy undergoes a phase transition as the subsystem size increases.

DOI: 10.1088/1674-1137/adbd1b

Source: http://hepnp.ihep.ac.cn/article/doi/10.1088/1674-1137/adbd1b