On Mon, Aug 26, 2019 at 9:25 PM Bruce Kellett <[email protected]> wrote:
> On Tue, Aug 27, 2019 at 10:35 AM Jason Resch <[email protected]> wrote: > >> On Mon, Aug 26, 2019 at 7:32 PM Bruce Kellett <[email protected]> >> wrote: >> >>> On Tue, Aug 27, 2019 at 10:27 AM Jason Resch <[email protected]> >>> wrote: >>> >>>> These videos provide a good introduction: >>>> >>>> https://www.youtube.com/watch?v=X5rAGfjPSWE >>>> https://www.youtube.com/watch?v=fG52mXN-uWI >>>> >>>> Virtual particles are the basis of all particle interactions in QED, >>>> called the jewel of physics for having made the most accurate predictions >>>> of any physical theory. >>>> >>> >>> The trouble is that virtual particles are internal lines in Feynman >>> diagrams, and the Feynman diagrams are formed as a perturbation expansion. >>> They have to be summed to make contact with physical processes. This puts >>> the status of virtual particles, as ontological entities, into considerable >>> doubt. Ultimately, they are nothing but a calculational device, and quantum >>> amplitudes can be evaluated without ever using Feynman diagrams, so virtual >>> particles need never appear anywhere. >>> >>> >> But this "calculational device" (funny how many things are mere devices) >> predicts the lamb shift as well as the Casimir effect, to great accuracy. >> > > No, virtual particles do not predict the Lamb shift -- they are just an > aid to calculating terms in the perturbation expansion of the QED vertex > function. > > Is this answer in error? https://physics.stackexchange.com/questions/443186/lamb-shift-and-virtual-particles Aren't virtual particles necessary for explaining the limited range of the strong force? And solving the blackhole information paradox? Jason -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/CA%2BBCJUhm9Y43-SK-gBPu3FEFKKpB%3DQSVH8iZGKfiha0uTJJnfg%40mail.gmail.com.
