标题： 自旋引起的Kerr-Newman黑洞在扩展标量-张量理论中的标量化 显示英文标题

标题： Spin-induced scalarization of Kerr-Newman black hole in extended scalar-tensor theory

摘要： 在扩展标量-张量-高斯-博内（ESTGB）场理论中，无质量标量场与高斯-博内曲率不变量之间存在某种非最小耦合，从而促进了Kerr-Newman（KN）黑洞的超光速不稳定性。在无限大的耦合极限下计算了KN黑洞自发标量化现象开始时的临界自旋和电荷。然后得到了在有限大的耦合区域中黑洞-标量场配置的耦合强度依赖的临界存在线的解析公式。此外，使用数值方法进行了阈值曲线，这些曲线是无发KN黑洞及其有发对应物之间的边界。有趣的是，我们了解到在ESTGB理论中，KN黑洞可以在自旋消失极限下发生标量化。 显示英文摘要

摘要： With certain non-minimal coupling between a massless scalar field and the Gauss-Bonnet curvature invariant in the extended scalar-tensor-Gauss-Bonnet (ESTGB) field theory, tachyonic instability of Kerr-Newman (KN) black hole is promoted. Critical spin and charge for the onset of the spontaneous scalarization phenomenon for the KN black hole are calculated in the infinitely large coupling limit. Then analytical formula for the coupling-strength-dependent critical existence line is obtained for the black-hole-scalar-field configuration in a finite large coupling regime. Moreover, numerical methods are used to perform threshold curves which are boundaries between bald KN black holes and their hairy counterparts. Intriguingly, we get to know KN black hole can be scalarized in the vanishing spin limit in ESTGB theory.