- Virtual black hole
quantum gravity, a virtual black hole is a black holewhich has a temporary existence as a result of a quantum fluctuationof spacetime. They are an example of quantum foamand are the gravitational analog of the virtual electron- positronpairs found in quantum electrodynamics. Theoretical arguments suggest that virtual black holes should have mass on the order of the Planck mass, lifetime around the Planck time, and occur with a number density of approximately one per Planck volume. [http://arxiv.org/abs/hep-ph/0009154v2 Proton Decay, Black Holes, and Large Extra Dimensions] , Fred C. Adams, Gordon L. Kane, Manasse Mbonye, and Malcolm J. Perry, arXiv:hep-ph/0009154v2.] , p. 4.
If virtual black holes exist, they provide a mechanism for
proton decay. The reason for this is that when a black hole's mass increases via mass falling into the hole, and then decreases when Hawking radiationis emitted from the hole, the elementary particles emitted will in general not be the same as those which fell in. Therefore, if two of a proton's constituent quarksfall into a virtual black hole, it is possible for an antiquarkand a leptonto emerge, thus violating conservation of baryon number., pp. 4–5.
The existence of virtual black holes aggravates the
black hole information loss paradox, as any physical process may potentially be disrupted by interaction with a virtual black hole. [ [http://arxiv.org/abs/hep-th/9508151v1 The black hole information paradox] , Steven B. Giddings, arXiv:hep-th/9508151v1.]
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