Spontaneous Dimensional Reduction?
arXiv:1207.4503 · doi:10.1063/1.4756963
Abstract
Over the past few years, evidence has begun to accumulate suggesting that spacetime may undergo a "spontaneous dimensional reduction" to two dimensions near the Planck scale. I review some of this evidence, and discuss the (still very speculative) proposal that the underlying mechanism may be related to short-distance focusing of light rays by quantum fluctuations.
To appear in Proc. of the Sixth International School on Field Theory and Gravity, Petropolis, Brazil, 2012
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