- #1

ndung200790

- 519

- 0

I think that the classical physical laws are the relations between expectation values of macroscopic objects(the values are taken average on ''quantum values'').The quantum physical laws in one sense are the relations between operators.Then there are a great difference between classical and quantum laws.So I do not understand why they say that the classical things are the leading order of aproximation of quantum things(e.g they say in leading order of aproximation the electromagnetic potential is square(e)/square(momentum)(in momentum space) when they considering renormalization group(considering the flow of electric charge under changing renormalization condition)).

Thank you very much in advance.