Beschreibung
First edition, journal issue in original printed wrappers. In a paper published 5 months earlier ('The radiation theories of Tomonaga, Schwinger, and Feynman'), Dyson had proved the equivalence between Richard Feynman's diagram-based approach to quantum electrodynamics (QED) and Julius Schwinger and Sin-Itiro Tomonaga's operator method approach. Dyson, "one of England's two or three most brilliant mathematical prodigies" (Gleick, Genius, p. 235), was then a graduate student at Cornell, where Feynman was teaching. "Dyson realized that Feynman and Schwinger were both dealing with different versions of Heisenberg's S-matrix [which encodes the probabilities associated with the different routes from the different possible initial states to the different possible final states). He then formally introduced 'time-ordering' and provided a unified approach by demonstrating the equivalence of the Feynman and Schwinger-Tomonaga theories. This approach also allowed him to show how the Schwinger theory could be greatly simplified and extended to all orders of the perturbation expansion. Dyson's time-ordering idea was actually obtained from discussions with Feynman, who later explored and fully developed it into his time-ordered operator calculus" (Gill, The Feynman-Dyson view, J. Phys.: Conf. Ser. 845, 2017). "The covariant quantum electrodynamics of Tomonaga, Schwinger, and Feynman is used as the basis for a general treatment of scattering problems involving electrons, positrons, and photons. Scattering processes, including the creation and annihilation of particles, are completely described by the S matrix of Heisenberg. It is shown that the elements of this matrix can be calculated, by a consistent use of perturbation theory, to any desired order in the fine-structure constant. Detailed rules are given for carrying out such calculations, and it is shown that divergences arising from higher order radiative corrections can be removed from the S matrix by a consistent use of the ideas of mass and charge renormalization" (Abstract). Complete journal issue, large 8vo, pp. 1637-1780. Original printed wrappers (signature of former owner on front wrapper, minor loss at spine ends). Bestandsnummer des Verkäufers ABE-1639651412183
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