Investigating the gedanken experiment to destroy the event horizon of a regular black hole
Investigating the gedanken experiment to destroy the event horizon of a regular black hole
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DOI：
10.1103/physrevd.101.084005
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发表时间：
2020-03
影响因子：
5
通讯作者：
Jie Jiang;Yunjiao Gao
中科院分区：
文献类型：
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作者：
Jie Jiang;Yunjiao Gao
最近，Li和Bambi提出了一个假设，即常规黑洞的事件视界可以被破坏，因为这些物体没有引力奇点，因此不受弱宇宙审查猜想（WCCC）的保护。在本文中，为了检验他们的假设，我们进行了索尔斯和沃尔德提出的新版本的 gedanken 实验，以对接近极值的静态电规则黑洞进行过度充电。在引入时空稳定性条件和物质场零能量条件后，我们基于Iyer-Wald形式推导了微扰物质场的一阶和二阶微扰不等式。结果，我们发现，在考虑这两个扰动不等式后，这些规则黑洞在二阶近似下无法被破坏，即使它们不受 WCCC 的保护。我们的结果表明，可能存在一些更深层次的机制来保护黑洞的事件视界。
Recently, Li and Bambi proposed a hypothesis that the event horizon of a regular black hole can be destroyed because these objects have no gravitational singularity and therefore they are not protected by the weak cosmic censorship conjecture (WCCC). In this paper, to test their hypothesis, we perform the new version of the gedanken experiments proposed by Sorce and Wald to overcharge a near extremal static electrically regular black hole. After introducing the stability condition of the spacetime and the null energy condition of matter fields, we derive the first-order and second-order perturbation inequalities of the perturbation matter fields based on the Iyer-Wald formalism. As a result, we find that these regular black holes cannot be destroyed under the second-order approximation after these two perturbation inequalities are taken into account, even though they are not protected by the WCCC. Our results indicate that there might be some deeper mechanisms to protect the event horizon of the black holes.