论文标题
爱因斯坦 - 马克斯韦 - 斯卡尔模型中的动态自发标量模型
Dynamical spontaneous scalarization in Einstein-Maxwell-scalar models in anti-de Sitter spacetime
论文作者
论文摘要
带电黑洞自发标量的现象引起了很多关注。在这项工作中，我们研究了爱因斯坦 - 马克斯韦尔 - 斯卡尔模型中渐近抗DE的保姆空间中带电的黑洞自发标量的动力学过程。包括标量场和麦克斯韦场之间的各种非最小耦合，我们观察到，初始无标量构型会遭受速度不稳定性，标量场和黑洞不可约的质量在早期时期成倍地成倍增长，并且在晚期呈指数增强。对于分数耦合，我们发现，尽管黑洞地平线附近有负能量分布，但黑洞地平线区域永远不会减小。但是，当参数很大时，线性不稳定的秃头黑洞的进化终点将是空位的裸露，并且侵犯了宇宙审查。详细研究了黑洞电荷，宇宙常数和耦合强度对动态标量过程的影响。我们发现足够大的宇宙常数可以防止自发标量。
The phenomenon of spontaneous scalarization of charged black holes has attracted a lot of attention. In this work, we study the dynamical process of the spontaneous scalarization of charged black hole in asymptotically anti-de Sitter spacetimes in Einstein-Maxwell-scalar models. Including various non-minimal couplings between the scalar field and Maxwell field, we observe that an initial scalar-free configuration suffers tachyonic instability and both the scalar field and the black hole irreducible mass grow exponentially at early times and saturate exponentially at late times. For fractional couplings, we find that though there is negative energy distribution near the black hole horizon, the black hole horizon area never decreases. But when the parameters are large, the evolution endpoints of linearly unstable bald black holes will be spacetimes with naked singularity and the cosmic censorship is violated. The effects of the black hole charge, cosmological constant and coupling strength on the dynamical scalarization process are studied in detail. We find that large enough cosmological constant can prevent the spontaneous scalarization.
