The average metric of a Lorentzian fuzzy-sphere fibre is spherical, and renormalisation freedom can make its size constant, providing a route from quantum gravity to gravity plus Yang-Mills.
Argota-Quiroz and S
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Kaluza-Klein ansatz from Lorentzian quantum gravity on the fuzzy sphere
The average metric of a Lorentzian fuzzy-sphere fibre is spherical, and renormalisation freedom can make its size constant, providing a route from quantum gravity to gravity plus Yang-Mills.