发表机构
School of Physics and Astronomy, Beijing Normal University; Instituto Federal de Educação, Ciência e Tecnologia do Ceará (IFCE); Universidade Federal do Cariri (UFCA), Instituto de Formação de Educadores–IFE; Key Laboratory of Multiscale Spin Physics (Beijing Normal University), Ministry of Education（北京师范大学物理与天文学院; 塞阿拉联邦教育、科学与技术学院; 卡拉伊里联邦大学教育家研究所; 教育部多尺度自旋物理重点实验室（北京师范大学））
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该研究从正则化弦云黑洞构造对称薄壳虫洞，分析其能量条件、多流体稳定性及光学特征，发现喉部位置和源分布影响成像结构。
AI 中文摘要
我们从有理正则化的Letelier-Alencar弦云黑洞的两个正lapse外部副本构造了一个对称薄壳虫洞，该黑洞具有有限曲率的反德西特核心和弦云渐近行为。利用Darmois-Israel形式主义，我们推导了表面应力、能量条件组合、守恒定律和有效势。每个允许的静态喉部都具有负的表面能量密度，因此弱能量条件和主导能量条件被违反，而限制在壳切向方向的零能量条件以及随之而来的内禀强能量条件，仅在内部采样的外部区域成立。体源的径向真空关系消除了外部动量通量。我们推导了一个适用于密度和半径相关状态方程的通用局部稳定性判据，并将其应用于五种表面流体模型，在每个静态喉部校准一个参数。在采样的族中，正压壳保持不稳定，而其他闭合形式可以允许参数依赖的稳定分支。一个精确的非正则化对照表明，前三种闭合形式的能量条件结构和径向稳定性符号在没有有理正则化器的情况下持续存在，而宇宙-恰普雷金稳定性符号可以改变，同时选定的校准分支保持实且简单。反向光线追踪表明，喉部位置主要重组高阶和穿喉图像，而弦云强度和倾角控制环形结构和多普勒不对称性。单侧和双侧源配置的比较隔离了真实的远侧图像，并表明中心暗区取决于源分布。
英文摘要
We construct a symmetric thin-shell wormhole from two copies of the positive-lapse exterior of a rationally regularized Letelier--Alencar string-cloud black hole with a finite-curvature anti--de Sitter core and string-cloud asymptotics. Using the Darmois--Israel formalism, we derive the surface stresses, energy-condition combinations, conservation law, and effective potential. Every admissible static throat has negative surface energy density, so the weak and dominant energy conditions are violated, whereas the null condition restricted to directions tangent to the shell, and consequently the intrinsic strong condition, holds only in the inner sampled exterior. The radial-vacuum relation of the bulk source removes the external momentum flux. We derive a general local-stability criterion for density- and radius-dependent equations of state and apply it to five surface-fluid models, calibrating one parameter at each static throat. Across the sampled families, barotropic shells remain unstable, whereas the other closures can admit parameter-dependent stable branches. An exact unregularized control shows that the energy-condition structure and the radial-stability signs of the first three closures persist without the rational regulator, whereas the cosmic-Chaplygin stability sign can change while the selected calibration branch remains real and simple. Backward ray tracing shows that throat location primarily reorganizes higher-order and through-throat images, while string-cloud strength and inclination control annular structure and Doppler asymmetry. Comparisons of one- and two-sided source configurations isolate genuine far-side images and show that the central dark region depends on the source distribution.
