On the Theory of the Electron and Positive; FromThe Physical Review, vol. 45, February 15, 1934. pp. 245-262

Minneapolis: Physical Review, 1934. First Edition. Offprint, 8vo (267 x 201mm), pp. 18, [2]. With an addendum reprinted from The Physical Review, Vol. 45, No. 5. March 1, 1934, 8vo (267 x 201mm), p. 1. This paper is a direct ancestor of Quantum Electrodynamics (QED), the most accurate theory in the history of science. It established the "Symmetry" between matter and antimatter that remains a cornerstone of physics today. Within this groundbreaking contribution to quantum field theory, Oppenheimer and Furry address the theoretical challenges posed by Paul Dirac's relativistic electron equation and the recent experimental discovery of the positron by Carl Anderson in 1932. The authors develop a symmetric treatment of electrons and positrons within the framework of the Dirac equation, moving beyond earlier approaches that treated positrons merely as "holes" in a filled electron sea. Their work establishes the theoretical foundation for understanding particle-antiparticle pairs as fundamental constituents of quantum field theory, with both particles accorded equal theoretical status rather than one being viewed as the absence of the other. This contribution proved essential for the subsequent development of quantum electrodynamics, as it provided the mathematical framework for treating creation and annihilation processes involving electron-positron pairs. Oppenheimer's significant contributions to theoretical physics during the 1930s, prior to his involvement in the Manhattan Project, are illustrated here, demonstrating the rapid theoretical response to experimental discoveries that characterized the golden age of quantum mechanics. Ref. Bethe, 1968 p. 395.