I think I unified physics, but surely that is nonsense. Can someone correct me?

"Unifying physics" means having a single theory -- i.e. a system of equations -- from which you can recover the equations of both General Relativity and the Standard Model in some limit (e.g. as certain parameters tends to certain values). What is the system of equations of your theory? In which limits do you recover GR and the SM?

One thing we'd hope a unified theory to do is answer questions, particularly about domains where both gravitational and quantum effects are non-negligible, which are not currently answered by GR or the SM. For example: is the dynamics characterising a quantum field in the vicinity of an evaporating black hole unitary? Does your theory answer any of question like that?

/r/AskPhysics Thread