On Sunday, November 18, 2018 at 3:20:47 PM UTC-6, agrays...@gmail.com wrote: > > > > On Sunday, November 18, 2018 at 9:14:25 PM UTC, Philip Thrift wrote: >> >> >> >> On Sunday, November 18, 2018 at 11:49:57 AM UTC-6, agrays...@gmail.com >> wrote: >>> >>> >>> *For the simple case of two histories, presumably of particles, how does >>> Feynman introduce interference? What's the conceptual framework for >>> interference among or between histories? TIA, AG * >>> >>>> >>>> >> Attached to each history is an "evolving" *unit complex number* [ >> https://en.wikipedia.org/wiki/Circle_group ], or UCN (the complex >> numbers of modulus 1). When histories are "summed" (the sum of UCNs at the >> end of the histories that go to the same end point) there is >> "interference" (just in the way complex numbers add up, since you can have >> a UCN pointing in one direction and another 180 plus or minus x degrees >> opposite). The modulus of that sum is then the "weight" for that end point. >> >> - pt >> > > *So Feynman adds this additional hypothesis to QM. Is this kosher? Also, > doesn't he used forward and backward in time histories? Finally, how does > he choose the histories and presumably eliminate forward and backward > spatial loops, or doesn't this matter? AG * >

His Sum Over Histories (Path Integral) is based on a set of postulates listed here: http://muchomas.lassp.cornell.edu/8.04/Lecs/lec_FeynmanDiagrams/node3.html It gives the same numerical results as the Hilbert space formulation. My Reflective Path integral has histories and futures (backwards-in-time histories). It puts multiple histories and time symmetry together. Feynman didn't do that. I did. - pt -- 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 everything-list+unsubscr...@googlegroups.com. To post to this group, send email to everything-list@googlegroups.com. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.