There are some other proposed approaches as well.
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.
There are some other proposed approaches as well.
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):