When an electron travels through a magnetic field, it alters course and by doing so it emits synchrotron radiation.
What we call magnetic field, as I understand it is a mathematical "simplification" of what would happen on average to (macroscopic) charged particles traveling through said field. But on a quantum scale, these events are explained through photon interactions, or virtual photon interactions. So I guess the virtual photons surrounding the electrons inside the magnet, interact with the electron passing by, altering its course. But there is also a "real" photon being emitted from the traveling electron. The synchrotron radiation photon. The magnet itself does not lose energy by altering the course of the electron. What puzzles me is: the electron changes course, by "spontanaous" emission of a synchrotron photon, so there is no net loss or gain of energy in the system, but it is not that spontanaous, because without the magnet present this would be a highly unlikely event. So if no energy is lost by the magnet, but it is still able to influence the electron's probability of emitting a synchrotron photon, what kind of interaction is this. Can we say that in a way,magnets are sort of a quantum probability amplifiers?