Micro Black Holes and the Democratic Transition

Abstract

Unitarity implies that the evaporation of microscopic quasi-classical black holes cannot be universal in different particle species. This creates a puzzle, since it conflicts with the thermal nature of quasi-classical black holes, according to which all the species should see the same horizon and be produced with the same Hawking temperatures. We resolve this puzzle by showing that for the microscopic black holes, on top the usual quantum evaporation time, there is a new time-scale which characterizes a purely classical process during which the black hole looses the ability to differentiate among the species, and becomes democratic. We demonstrate this phenomenon in a well-understood framework of large extra dimensions, with a number of parallel branes. An initially non-democratic black hole is the one localized on one of the branes, with its high-dimensional Schwarzschild radius being much shorter than the interbrane distance. Such a black hole seemingly cannot evaporate into the species localized on the other branes, that are beyond its reach. We demonstrate that in reality the system evolves classically in time, in such a way that the black hole accretes the neighboring branes. The end result is a completely democratic static configuration, in which all the branes share the same black hole, and all the species are produced with the same Hawking temperature. Thus, just like their macroscopic counterparts, the microscopic black holes are universal bridges to the hidden sector physics.

35 pages, 5 figures

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Cited by in corpus (10)

• Evaporation of Microscopic Black Holes in String Theory and the Bound on Species
• Quantum black holes with charge, colour, and spin at the LHC
• Phenomenology of 10^32 Dark Sectors
• Black Hole Masses are Quantized
• A bound on the effective gravitational coupling from semiclassical black holes
• Compact Dark Matter Objects via $N$ Dark Sectors
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• Production and evaporation of micro black holes as a link between mirror universes
• Consequences of Gravity-Induced Couplings in Theories with Many Particle Species
• Cosmic ray induced micro black hole showers