Black Hole as a Wormhole Factory
arXiv:1502.06375 · doi:10.1016/j.physletb.2015.10.045
Abstract
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.
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
References in corpus (13)
- The Confrontation between General Relativity and Experiment
- Quantum Gravity at a Lifshitz Point
- Cool horizons for entangled black holes
- Traversable wormholes from surgically modified Schwarzschild spacetimes
- Solutions to Horava Gravity
- Test bodies and naked singularities: is the self-force the cosmic censor?
- Weak Cosmic Censorship: As Strong as Ever
- Overspinning a Kerr black hole: the effect of self-force
- Overspinning a nearly extreme charged black hole via a quantum tunneling process
- BTZ Black Hole with Gravitational Chern-Simons: Thermodynamics and Statistical Entropy
- Thermodynamics of Exotic Black Holes, Negative Temperature, and Bekenstein-Hawking Entropy
- Can Hawking temperatures be negative ?
- BTZ Black Hole with Higher Derivatives, the Second Law of Thermodynamics, and Statistical Entropy: A New Proposal