Title: Perturbations and Greybody Factors of AdS Black Holes with a Cloud of Strings Surrounded by Quintessence-like Field in NLED Scenario Show Chinese title

Title: 扰动与在NLED场景下被类量子场包围的弦云周围AdS黑洞的灰体因子

Abstract: The discovery of gravitational waves and advances in black hole imaging have opened new opportunities to probe exotic physics in strong-field regimes. Building upon a recent black hole solution in Einstein gravity coupled with nonlinear electrodynamics and exotic matter sources-specifically a cloud of strings and a quintessence field--we study the perturbative dynamics, thermodynamic behavior, and quantum transmission characteristics in anti-de Sitter spacetime. The black hole, defined by its mass, nonlinear magnetic charge, string cloud, and quintessence parameters, exhibits modified spacetime geometry, horizon structure, Hawking temperature, and effective potentials governing field propagation. We derive Schr\"{o}dinger-like equations for massless scalar, electromagnetic, and fermionic perturbations, exploring how these sources jointly shape the potential barriers. The Hawking temperature shows strong dependence on the horizon radius and nonlinear charge, differing markedly from asymptotically flat cases due to the cosmological constant. Greybody factors, describing Hawking radiation transmission probabilities, are computed for all field spins via turning point analysis. A notable result arises in the fermionic sector: positive and negative helicity modes attain maximal transmission at distinct quintessence normalization values, revealing helicity-dependent coupling absent in bosonic channels. This asymmetry suggests a potential observational signature of spin-exotic matter interactions, offering new insights into detecting quintessence through black hole radiation spectra. Our results extend previous perturbative analyses by incorporating nonlinear electrodynamics, cosmic strings, and quintessence effects--linking quantum radiation studies to gravitational wave astronomy and early-universe cosmology. Show Chinese abstract

Abstract: 引力波的发现和黑洞成像技术的进步为探索强场区域的奇异物理提供了新的机会。 在最近的爱因斯坦引力与非线性电动力学及奇异物质源（特别是弦云和第五元素场）耦合下的黑洞解基础上，我们研究了反德西特时空中的微扰动力学、热力学行为和量子传输特性。 该黑洞由其质量、非线性磁荷、弦云和第五元素参数定义，表现出修改的时空几何、视界结构、霍金温度以及控制场传播的有效势。 我们推导了无质量标量、电磁和费米子微扰的薛定谔方程，探讨了这些源如何共同塑造势垒。 霍金温度对视界半径和非线性电荷有强烈依赖，由于宇宙常数的存在，与渐近平直情况有显著不同。 通过转折点分析计算了所有自旋场的灰体因子，描述霍金辐射的传输概率。 一个显著的结果出现在费米子部分：正负手性模式在不同的第五元素归一化值下达到最大传输，揭示了在玻色子通道中不存在的手性依赖耦合。 这种不对称性表明了自旋-奇异物质相互作用的潜在观测特征，为通过黑洞辐射光谱检测第五元素提供了新见解。 我们的结果通过引入非线性电动力学、宇宙弦和第五元素效应扩展了先前的微扰分析——将量子辐射研究与引力波天文学和早期宇宙宇宙学联系起来。