303 | AMA | February 2025

8490.934 - 8513.238 Sean Carroll

Einstein's general theory of relativity is a classical field theory. In quantum field theory, we have rules for taking a classical field theory and quantizing it. And in the case of gravity, these rules don't work. The straightforward way of saying this is that it's not a renormalizable theory, which is to say that if you try to extend your quantum field theory version of gravity,