what exactly happens in this theory? is it a list of possible paths that the particle COULD take, or is it the paths the particle DID take? also, wouldnt there be an infinite amount of paths? how do these cancel out?
Feynman said:selfAdjoint talk write.
But the problem is bigger .
the problem is how we can define this integral?
maudr said:Feynman DID NOT invent path integrals. Path integrals are a way to sum a function which values every point in n-space when taking a particular path. That's what they are. Feynman used a different kind of integral, and the terminology's confused - the two types of path integrals don't mean the same thing.
masudr said:Do read QED, it's brilliant. Forget what Stephen Hawking thinks (well not everything he thinks).I think Feynman's one of THE greatest theorists for his path integral formulation of quantum mechanics.
SelfAdjoint said:Technically, though, you're right. Feynmann didn't invent them, Dirac did. Feynman's insight was the big introduction of path integrals into pjysics.