richard feynman feynmans first qed (2 résultats)

Soft cover. Etat : Very Good. 1st Edition. FEYNMAN, R.P. An operator calculus having application in quantum electrodynamics . Physical Review 1951. vol 84: 108-128. Original wrappers. Very good copy.++This is Al Wattenburg's (Fermi Group, Chicago, nuclear pile). [NOTE: the faint white vertical lines in the photo are from the scan, NOT on the issue of PR.]From "The Selected Papers of Richard Feynman, with Commentary", edited by Laurie Brown (World Scientific): In 1951, Feynman completed his work on quantum electrodynamics, describing and applying a new operator calculus for operators dependent on a continuous parameter (such as the time), which describes the ordering of application of the generally non-commuting operators. Using the ordering parameter, the ordinary methods of calculus (integration and power series expansions, for example) can be carried through without regard to the ordering until the final result, which is then appropriately reordered.Evidently Feynman hoped that his new method for dealing with operators would have a wider application, but that does not seem to be the cae (at least so far!)".

Soft cover. Etat : Good. Richard P. Feynman. "Relativistic Cut-Off for Quantum Electrodynamics" in "The Physical Review." Volume 74, No. 10, 15 November 1948. Lancaster, American Institute of Physics, 1948. Pp. 1430-1438 in the issue of pp 1271-1567. First edition. Nice copyextracted from a larger bound volume, but that is reflected in the price. [++] The 1965 Nobel Prize in Physics was awarded jointly to Richard P. Feynman, Julian Schwinger, and Sin-Itiro Tomonaga "for their fundamental work in quantum electrodynamics, with deep ploughing consequences for the physics of elementary particles". Their contributions significantly advanced the understanding of particle physics and laid the groundwork for many modern theories in quantum mechanics. No wrappers. Full bi-weekly issue, extracted from a larger bound volume.