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Yes, and this important fact is usually ignored by those who try to ascribe some reality to virtual particles. Insisting on incorporating this fact into a realistic interpretation of virtual particles would be like saying that virtual particles are real only when their number is sufficiently small (say less than 137 in the case of QED). Which, of course, would not make sense.tom.stoer said:... so perturbation theory does not make sense to arbitrary high order; its radius of convergence is zero.
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