arXiv 1502.063752015-02hep-thgr-qc

作为虫洞工厂的黑洞

Black Hole as a Wormhole Factory

Sung-Won Kim, Mu-In Park

备注：: Added some more words on (1) the transition between the black hole phase and wormhole phase and (2) the notion of a wormhole "factory" in Fig. 5. Updated references, Accepted in PLB
DOI：: 10.1016/j.physletb.2015.10.045

摘要：

一般来说，人们可能会认为黑洞在普朗克质量时停止辐射，辐射的能量与黑洞的质量相当。此外，有人认为，由于普朗克长度以下的大波动，会有一个“虫洞状”结构，称为“时空泡沫”。在本文中，作为一个显式的例子，我们考虑一个精确的经典解，很好地代表了这两个属性在最近提出的量子引力模型的基础上不同的标度维之间的空间和时间坐标。解决方案，被称为"黑虫洞"，由两个不同的状态，取决于它的质量M和IR参数Ω：对于黑洞状态，一个不可穿越的虫洞占据的内部区域的黑洞周围的奇点在原点，而对于虫洞状态，内部虫洞暴露于外部观察者作为黑洞视界从蒸发消失。当黑洞的状态接近内部虫洞喉道和黑洞视界的合并点时，它会变得物理稳定，而霍金温度在这个合并点处消失。这个解决方案建议"广义宇宙审查"的存在，一个虫洞状的结构，保护裸奇点，即使在黑洞蒸发。人们可以将黑洞视界内的虫洞理解为霍金辐射过程中进入黑洞视界的"负"能量量子产生的微观虫洞的结果：量子黑洞可能是一个虫洞工厂。研究发现，这种推测性的图片可能与最近解决最近黑洞纠缠争论的“ER = EPR”提议是一致的。

英文摘要：

On general grounds, one may argue that a black hole stops radiation at the Planck mass, where the radiated energy is comparable to the black hole's mass. And also, it has been argued that there would be a "wormhole-like" structure, known as "space-time foam", due to large fluctuations below the Planck length. In this paper, as an explicit example, we consider an exact classical solution which represents nicely those two properties in a recently proposed quantum gravity model based on different scaling dimensions between space and time coordinates. The solution, called "Black Wormhole", consists of two different states, depending on its mass M and an IR parameter omega: For the black hole state, a non-traversable wormhole occupies the interior region of the black hole around the singularity at the origin, whereas for the wormhole state, the interior wormhole is exposed to an outside observer as the black hole horizon is disappeared from evaporation. The black hole state becomes thermodynamically stable as it approaches to the merge point where the interior wormhole throat and the black hole horizon merges, and the Hawking temperature vanishes at the exact merge point. This solution suggests the "Generalized Cosmic Censorship" by the existence of a wormhole-like structure which protects the naked singularity even after the black hole evaporation. One could understand the would-be wormholes inside the black hole horizon as the results of microscopic wormholes created by "negative" energy quanta which have entered the black hole horizon in Hawking radiation processes: The quantum black hole could be a wormhole factory. It is found that this speculative picture may be consistent with the recent "ER=EPR" proposal for resolving the recent black hole entanglement debates.

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英文摘要：

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