I am watching this video:
youtube.com/watch?v=jlEovwE1oHI . At 10:30-ish in the video, the presenter states that the quantum fields only accept discrete amounts of energy, and that (say) if 2x 0.511 MeV of energy is added to the electron field, then two electrons will be created. I'm a bit confused because I have heard of "high energy" electrons, which I presume have n-times the 0.511 MeV of energy a "basic" electron would have. Could someone please help me understand this?