Spontaneous dimensional reduction in quantum gravity
- Author(s): Carlip, S
- et al.
Published Web Locationhttps://doi.org/10.1142/S0218271816430033
Hints from a number of different approaches to quantum gravity point to a phenomenon of "spontaneous dimensional reduction" to two spacetime dimensions near the Planck scale. I examine the physical meaning of the term "dimension" in this context, summarize the evidence for dimensional reduction, and discuss possible physical explanations.