Physics of the Dark Universe ( IF 5.0 ) Pub Date : 2020-07-02 , DOI: 10.1016/j.dark.2020.100660 Sushant G. Ghosh , Arun Kumar , Dharm Veer Singh
Lovelock gravitation theory is a natural extension of the General Relativity to higher dimensions with the inclusion of only second-order terms correspond to the Einstein–Gauss–Bonnet gravity. In this paper, we find an exact Hayward black hole solution of -dimensional spacetime for Einstein–Gauss–Bonnet (EGB) gravity with negative cosmological constant () minimally coupled to non-linear electrodynamics for a specific Lagrangian density, namely, EGB-AdS black holes, with additional parameter because of magnetic charge. Interestingly, it turns out that for each value of GB parameter , there exist a critical such that for describe non-extremal black holes with Cauchy () and Event horizons (), while for corresponds to an extremal regular black hole with degenerate horizons (). Owing to the magnetically charged corrected black hole, the thermodynamic quantities have also been modified, but the entropy does not satisfy the usual area law. A divergence of the specific heat at , where the temperature attains maximum value and the Hawking–Page transition is achievable with the stable (unstable) branch for (). Thus, we found Hayward EGB-AdS black holes which do not evaporate completely, but lead to stable double-horizon black hole remnants with vanishing temperature and positive heat capacity.
中文翻译:
爱因斯坦–高斯–盖尼引力中的Anti-de Sitter Hayward黑洞
拉夫洛克引力理论是广义相对论向更高维度的自然延伸,只包含了与爱因斯坦-高斯-贝内特引力相对应的二阶项。在本文中,我们找到了一个精确的Hayward黑洞解宇宙常数为负的爱因斯坦-高斯-帽子(EGB)重力的三维时空()最小耦合到特定拉格朗日密度的非线性电动力学,即EGB-AdS黑洞,并带有附加参数 因为有电荷 有趣的是,事实证明,对于GB参数的每个值,存在一个关键 这样 用柯西(Cauchy)描述非极端的黑洞()和事件范围(),而 对应于视界退化的极端规则黑洞()。由于带磁性的校正黑洞,热力学量也已修改,但熵不满足通常的面积定律。比热在,其中温度达到最大值,并且可以通过稳定(不稳定)的分支实现Hawking-Page转换 ()。因此,我们发现海沃德EGB-AdS黑洞不会完全蒸发,但会导致稳定的双水平黑洞残迹,并且温度和正热容均消失。