The Hamiltonian Equation and the Vector Potential

The momentum of any electron in a superconductor is connected to every other electron or coopropair in that superconductor. That's where this really comes in. All these other things are not going to be connected in any way close to that stuff that's actually going on in the material. So I would look at that and say that he's probably looking at something like the effective mass. He's just going over the experimental evidence for GR, and he's showing how G4V predicts all of it using the mathematics of that case.