New model imagines e moving through a cubic lattice on which two wave equations run at each point: One tells matter how to move. It is the KG equation with a dynamic mass term. The other is the source of the dynamic mass term, it tells e how fast it can move. Extrapolated across the lattice points, we measure that as spacetime curving. Ladies and gentlemen, the substrate equation you have been looking for.
New model imagines e moving through a cubic lattice on which two wave equations run at each point: One tells matter how to move. It is the KG equation with a dynamic mass term. The other is the source of the dynamic mass term, it tells e how fast it can move. Extrapolated across the lattice points, we measure that as spacetime curving. Ladies and gentlemen, the substrate equation you have been looking for.