具有非平凡核心与渐近结构的弦黑洞：引力解耦方法
Regular fluid of strings black hole with non trivial core and asymptotic structure by gravitational decoupling
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中文总结 AI 辅助
本文采用引力解耦方法，构造由各向异性弦流体支撑的正则黑洞，研究发现弦参数可改变黑洞热力学演化与准正则模谱，为弦支撑黑洞的正则化提供了新的物理方案。
中文摘要 AI 辅助
弦云（Cloud-of-strings, CS）几何为一维弦分布提供了有效描述。然而，其中心奇点无法通过基于有效质量函数的常规正则黑洞（regular black holes, RBH）机制消除，因为弦部分独立贡献于时空的紫外结构。受此观察启发，我们研究能否在保留CS渐近性且承认物理上有意义的弦流体解释的同时，对弦支撑黑洞进行一致正则化。利用引力解耦方法，我们构造了由有效各向异性弦流体支撑的RBH。研究表明，弦部分会使德西特（de Sitter）核心发生形变，修改类空切片的局域拓扑，并引入比通常Hayward/LQG项占主导的更长程修正。该几何既包含非极端和极端RBH，也包含正则无视界致密天体。此外，弦参数通过移动戴维斯（Davies）相变位置和黑洞残余物的尺寸，定性改变了热力学演化。最后，标量准正则模谱在振荡频率和阻尼率两方面均表现出系统性变化。这些结果表明，正则化弦支撑黑洞是一个物理上截然不同的问题，其物质部分支配着时空的紫外结构、热力学和动力学响应。
英文摘要
Cloud-of-strings (CS) geometries provide an effective description of one-dimensional string distributions. However, their central singularity cannot be removed through the standard regular black holes (RBH) mechanism based on an effective mass function, since the string sector contributes independently to the ultraviolet structure of the spacetime. Motivated by this observation, we investigate whether string-supported black holes can be consistently regularized while preserving the CS asymptotics and admitting a physically meaningful string-fluid interpretation. Using the gravitational decoupling method, we construct a RBH supported by an effective anisotropic string fluid. We show that the string sector deforms the de Sitter core, modifies the local topology of the spacelike slices, and introduces a longer-range correction dominating the usual Hayward/LQG term. The geometry admits non-extremal and extremal RBH, as well as a regular horizonless compact object. Moreover, the string parameter qualitatively modifies the thermodynamic evolution by shifting the Davies phase transition and the size of the black-hole remnant. Finally, the scalar quasinormal-mode spectrum exhibits systematic changes in both the oscillation frequencies and damping rates. These results show that regularizing string supported black holes is a physically distinct problem, with the matter sector governing the ultraviolet structure, thermodynamics, and dynamical response of the spacetime.
