论文标题
de保姆黑洞的近乎限制
Near-Extremal Limits of de Sitter Black Holes
论文作者
论文摘要
我们用正宇宙常数分析了四维爱因斯坦 - 马克斯韦尔理论中带电黑洞的极端性的热力学反应。后者展示了三个不同的极限，称为冷，nariai和Ultracold配置，分别具有接近马的几何形状广告$ _2 \ times s^2 $，ds $ _2 \ times s^2 $，mink $ _2 \ times s^times s^2 $。对于这三个案例，我们分析了远离极我的小变形，并将其对比它们的反应。我们还构建了通过尺寸还原获得的有效的二维理论，该理论捕获了这些特征，并对每种情况的近距离几何形状周围的扰动提供了更详细的分析。我们对超低情况的结果尤其表明了熵变化和电荷变化之间的有趣相互作用，从而意识到相对于其他两个近近外限制的对称性破坏。
We analyze the thermodynamic response near extremality of charged black holes in four-dimensional Einstein-Maxwell theory with a positive cosmological constant. The latter exhibit three different extremal limits, dubbed cold, Nariai and ultracold configurations, with near-horizon geometries AdS$_2 \times S^2$, dS$_2 \times S^2$, Mink$_2 \times S^2$, respectively. For each of these three cases we analyze small deformations away from extremality, and contrast their response. We also construct the effective two-dimensional theory, obtained by dimensional reduction, that captures these features and we provide a more detailed analysis of the perturbations around the near-horizon geometry for each case. Our results for the ultracold case in particular show an interesting interplay between the entropy variation and charge variation, realizing a different symmetry breaking with respect to the other two near-extremal limits.
