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So Feynman's path integral considers every possible path that a particle could take from start to end. In that process, there would be a path which contains a segment from, say, A to B at time t. But there could also be a path with a segment from B to A at that same time, t. If so, would this appear to be the antiparticle of the previous path segment? And would this represent the usual picture of a virtual particle pair created at some point and annihilating at a different point?

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