1. Yes, a gradient is required. If the energy of the diamagnetic material does not change, there cannot be a force, as this will violate conservation of energy. You are proposing a perpetual motion machine of the first kind.
2. The quantum nature of diamagnetism doesn't matter in the slightest to the argument being made, so why are you bringing this up?
1. Yes, a gradient is required. If the energy of the diamagnetic material does not change, there cannot be a force, as this will violate conservation of energy. You are proposing a perpetual motion machine of the first kind.
2. The quantum nature of diamagnetism doesn't matter in the slightest to the argument being made, so why are you bringing this up?