> Doesn't the time-bandwidth reciprocity fall out of the same math as the Heisenberg Uncertainty Principle? Only loosely. Bandwidth in a traditional cavity is

> Doesn't the time-bandwidth reciprocity fall out of the same math as the Heisenberg Uncertainty Principle? Only loosely. Bandwidth in a traditional cavity is related to the loss in the cavity. (Energy coming out of a laser cavity is loss from the standpoint of the cavity.) There isn't a Lagrangian where bandwidth is the conjugate "momentum" to time. So not rigorously related to HUP, to my knowledge. > Does this work have implications for HUP "workarounds"? Doubtful. Non-reciprocal materials may seem like magic, but they are built out of things that still obey fundamental QM. But who knows, the world is a strange place.