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DERIVATION OF TIME BACKWARDS. “Feynman's view derived from Einstein's version of Lorentz invariant symmetry, together with Feynman's contention that the final probability of some quantum event was the square of the sum of the amplitudes of all possible paths to the result.” https://lnkd.in/gDaxUYAS View in LinkedIn

BACKWARDS IN TIME. “On the same page, in a footnote he says that antiparticles can be easily made and kept for weeks, so he had no problem with antiparticles moving backwards in time indefinitely. It is hard to find another example of a physicist of such legendary status being in a minority of one on his fundamental insight which had never been disproved.” (Feynman). https://lnkd.in/gDaxUYAS View in LinkedIn

FEYNMAN. “As late as 1985, three years before his death, in his book "QED" he stated that "every particle in Nature has an amplitude to move backwards in time, and therefore has an antiparticle".” https://lnkd.in/gDaxUYAS View in LinkedIn

MIRROR OPAQUE. “Throughout Feynman's career he insisted that no experiment could detect a difference between his version of antimatter and the conventional one.” https://lnkd.in/gDaxUYAS View in LinkedIn

HAVING THE CAKE. “For similar philosophical reasons, physicists regard Feynman's version as "unphysical", preferring particles of opposite charge, for example, proceeding as usual in time, yet they also want time to be symmetrical.” https://lnkd.in/gDaxUYAS View in LinkedIn

BASIS OF VIEWPOINT. “Interestingly, Sakurai bases his view not on the experimental unreality of motion backward in time, but on avoiding its "logical disadvantages".” https://lnkd.in/gDaxUYAS View in LinkedIn

TEXTBOOK INTERPRETATION. “Sakurai prefers to regard Feynman's graphical method as a convenient pictorial device, rather than accept the motion of antiparticles backward in time as a suitable foundation for quantum electrodynamics.” https://lnkd.in/gDaxUYAS View in LinkedIn

SYNTHESIS OF CONJECTURES. “Let us combine the Feynman-Stueckelberg interpretation with the STH above, at times +t and -t very close to zero, when equal amounts of matter and antimatter are being created.” (STH = Symmetrical Time Hypothesis). https://lnkd.in/gDaxUYAS View in LinkedIn

CONSENSUS. “Physicists insist that the Schrodinger equation is symmetric in time and has no preference for a particular now. Let us take this completely seriously.” https://lnkd.in/gDaxUYAS View in LinkedIn

GO FOR THE RIDE. “If we are faced with two alternative hypotheses, both consistent with experiment, one with great explanatory power and leading to a completely symmetric spacetime, the other asymmetric and full of philosophical problems, perhaps we can suspend our disbelief still further and see what the STH predicts.” (STH = Symmetrical Time Hypothesis). https://lnkd.in/gDaxUYAS View in LinkedIn