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arXiv 2007.06766gr-qc
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带电黑洞的大质量标量波包发射与宇宙审查猜想的违反

Massive scalar wave packet emission by a charged Black Hole and Cosmic Censorship Conjecture violation

Rodrigo L. Fernandez, Ribamar R. R. Reis, Sergio E. Jorás

摘要:

本文研究了一个大质量($m_w$)不带电标量包从一个近极值静态带电黑洞(质量为$M$,电荷为$Q\lesssim M$)中隧穿出来的几率.我们证明了一个大质量的不带电粒子从黑洞中隧穿出来的净概率确实存在,因此最终态(具有新的质量$M'\equiv M-m_w < Q$)确实违反了宇宙审查猜想。然而,这种黑洞放电(即从周围环境吸收电荷$-Q$,然后变成中性)的典型时间远小于隧穿时间;因此,在实践中永远不会达到违反。即使对于一个完全孤立的黑洞(如果它存在的话),视界附近的标准时间膨胀也会将典型的破坏时间尺度拉伸到不可观测的值。

英文摘要:

We study the tunneling probability of a massive ($m_w$) uncharged scalar packet out from a near-extremal, static charged black hole (with mass $M$ and charge $Q\lesssim M$). We show that there is indeed a net probability that a massive uncharged particle tunnels out from the black hole so that the final state (with new mass $M'\equiv M-m_w < Q$) does violate the cosmic censorship conjecture. Nevertheless, the typical time for such a black hole to discharge (i.e, to absorb charge $-Q$ from its surroundings and then become neutral) is much smaller than the tunneling time; therefore, the violation is never attained in practice. Even for a completely isolated black hole (should it exist), the standard time dilation near the horizon stretches the typical violation time scale to unobservable values.

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