Yes, indeed. This one is actually new to me (thanks!).
There are actually plenty of them: https://en.wikipedia.org/wiki/Quantum_gravity#Other_theories
I am particularly fond of https://en.wikipedia.org/wiki/Causal_dynamical_triangulation for this interesting “emergent dimensionality” feature (the crazy 4D vs 2D aspect):
There is evidence that, at large scales, CDT approximates the familiar 4-dimensional spacetime but shows spacetime to be 2-dimensional near the Planck scale, and reveals a fractal structure on slices of constant time.
Yes, indeed. This one is actually new to me (thanks!).
There are actually plenty of them: https://en.wikipedia.org/wiki/Quantum_gravity#Other_theories
I am particularly fond of https://en.wikipedia.org/wiki/Causal_dynamical_triangulation for this interesting “emergent dimensionality” feature (the crazy 4D vs 2D aspect):