如何不从黑洞中提取信息：作为指导原则的宇宙审查
How Not to Extract Information From Black Holes: Cosmic Censorship as a Guiding Principle
摘要：
广义相对论中的黑洞通常被认为是朝着史瓦西态演化的，因为它们在霍金蒸发下逐渐失去角动量和电荷。但是，当Kim和Wen将量子信息理论应用于霍金蒸发，并认为具有最大互信息的霍金粒子可以主导发射过程时，他们发现带电的黑洞倾向于极端性。鉴于一些证据表明极端黑洞实际上是奇异的，这将违反宇宙审查猜想。然而，由于Kim-Wen模型过于简单（例如，它假设具有任意荷质比的粒子的连续谱），人们可能希望更现实的模型可以避免这个问题。在这项工作中，我们表明，只有有限种类的带电粒子实际上会使情况恶化，一些最终状态成为裸奇点。以这个模型为例，我们强调需要研究带电黑洞在给定的霍金蒸发模型下是否可以违反宇宙监督。
英文摘要：
Black holes in general relativity are commonly believed to evolve towards a Schwarzschild state as they gradually lose angular momentum and electrical charge under Hawking evaporation. However, when Kim and Wen applied quantum information theory to Hawking evaporation and argued that Hawking particles with maximum mutual information could dominate the emission process, they found that charged black holes tend towards extremality. In view of some evidence pointing towards extremal black holes being effectively singular, this would violate the cosmic censorship conjecture. Nevertheless, since the Kim-Wen model is too simplistic (e.g. it assumes a continuous spectrum of particles with arbitrary charge-to-mass ratio), one might hope that a more realistic model could avoid this problem. In this work, we show that having only a finite species of charged particles would actually worsen the situation, with some end states becoming a naked singularity. With this model as an example, we emphasize the need to study whether charged black holes can violate cosmic censorship under a given model of Hawking evaporation.
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