EXTREMELY RARE FIRST EDITION OFFPRINT of a critical paper by Max Born and Pascual Jordan that “defines the direction towards a valid Quantum Theory”.
“The decisive step, which defines the direction towards a valid Quantum Theory, is contained in the publication by Max Born and Pascual Jordan (Z. Phys. 33, 11 June 1925)… Born recognized that Quantum Mechanics without Quantum Optics is logically inconsistent; quantization of the action variable has to affect all physical variables and all laws of nature. Born’s conviction was strengthened by new experimental information, which had become available. Coincidence experiments by W. Bothe and H. Geiger had shown that Einstein’s photon concept requiring momentum and energy conservation for all elementary processes gained strong support from their experimental results on the Compton Effect…
“In is in this paper of June 1925 that Born’s quantization concept is extended from Quantum Mechanics to include Quantum Optics. The introduction of Quantenmechanik by Born had been based on quantization of the action variable, requiring discontinuous dynamic; but this same reasoning has to affect not only mechanical variables but the radiation field as well. Born and Jordan introduce the expression “Quantenoptik”, attributing its basic laws to Einstein. Born’s intention to transform continuous classical mechanics into a discontinuous Quantum Mechanics logically had to be compatible with Einstein’s Quantum Optics.
“A general principle is formulated, which serves as guide on the path from classical to quantum behavior: ‘A fundamental principle of wide range and fruitfulness states that the true laws of nature contain only such quantities which can be observed and determined in principle.’” (Herbert Capellmann, The Development of Elementary Quantum Theory).
Born and Jordan’s “fundamental principle” provides philosophical underpinning for their following papers of 1925 and 1926 that, along with Heisenberg’s work, established the theoretical foundation for quantum mechanics.
Max Born shared (1/2) of the 1954 Nobel Prize in Physics "for his fundamental research in quantum mechanics, especially for his statistical interpretation of the wavefunction”.
OFFPRINT (“SONDERABDRUCK”) FROM: Zeitschrift Für Physik, Band 33, Heft 7, pp. 479-505. Berlin: Julius Springer, 1925. Octavo, original wrappers; custom box. Stamp of the Dunbar Laboratory, Harvard on rear wrapper. Only very minor wear. In outstanding condition. RARE.
Price: $1,900 .