发表机构
Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México (UNAM); Instituto de Física y Astronomía, Universidad de Valparaíso（墨西哥国立自治大学核科学研究所; 瓦尔帕莱索大学物理与天文学研究所）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该研究探究理想流体暗物质与暗能量场对非线性磁性 AdS 黑洞相结构的影响，明确相变驱动因素及暗 sector 效应，证实黑洞等系统存在普适热力学行为。
AI 中文摘要
我们研究了理想流体暗物质（PFDM）和暗能量场对非线性带磁反德西特（AdS）黑洞相结构的影响。结果发现，大小黑洞（SBH/LBH）相变由非线性磁扇区驱动，而暗 sector 不会产生额外相变。具体而言，增大 PFDM 参数 λ 的幅值会抑制该相变，最终使系统趋向单相态；此外，非零 λ 会阻止规则黑洞核心的形成。暗能量场的效应取决于其状态方程参数：在 quintessence （精质） regime（区域）中，增大其强度会增强一阶相变，增大吉布斯构造面积和潜热，同时减小临界区域；在 phantom（幻影） regime（区域）中，系统表现出旋节线行为，无相共存现象。最后，几何热力学（GTD）表明，热力学平衡流形的曲率奇点重现了黑洞的相结构，而临界附近的相关幂律标度与黑洞、宇宙学视界及真实流体的先前结果一致，表明这些系统存在普适热力学行为。
英文摘要
We investigate the effects of perfect fluid dark matter (PFDM) and a dark-energy field on the phase structure of a nonlinear magnetically charged Anti--de Sitter (NLMC--AdS) black hole. The full thermodynamic system is analyzed numerically, while exact critical points are obtained for the limiting cases. Small--large black hole (SBH/LBH) phase transitions emerge in both the limiting geometries and the full solution within the quintessence regime. Moreover, the critical ratio $ρ_c=P_c v_c/T_c$ differs from the standard Reissner--Nordström--AdS (RN--AdS)/van der Waals (vdW) value, $ρ_c=3/8$. Our results show that the dark-sector parameters significantly influence the strength and persistence of the first-order transition. In the quintessence regime, a stronger dark-energy contribution enhances the swallow-tail structure of the Gibbs free energy and increases the latent heat associated with SBH/LBH coexistence. In contrast, a larger magnitude of the PFDM parameter $|λ|$ progressively suppresses the swallow-tail structure and the corresponding first-order transition, eventually leading to a single-phase regime. In the phantom regime, the system instead exhibits spinodal behavior without phase coexistence. We also find that any nonzero $λ$ prevents the formation of a regular magnetic core. Finally, geometrothermodynamics (GTD) reproduces the phase structure through singularities of the thermodynamic curvature, while the associated critical scaling is consistent with results reported for black holes, cosmological horizons, and real fluids, pointing toward a broader universality of thermodynamic critical behavior.
CommentsAccepted for publication in Physics of the Dark Universe
Journal refPhys. Dark Universe (2026) 102472
DOI：10.1016/j.dark.2026.102472
