#428 – Sean Carroll: General Relativity, Quantum Mechanics, Black Holes & Aliens

4079.019 - 4100.888 Sean Carroll

Things need to be robust and they all talk to each other in quantum field theory. So how do you stop that from happening? And the answer is symmetry. You can impose a symmetry that protects your new field from talking to any other fields, okay? And this is good for two reasons. Number one, it can keep the dynamics slow. So you can't tell me why it's slow. You just made that up.