Understanding Heisenberg's 'Magical' Paper of July 1925: a New Look at the Calculational Details

Ian J. R. Aitchison, David A. MacManus, Thomas M. Snyder

In July 1925 Heisenberg published a paper [Z. Phys. 33, 879-893 (1925)] which ended the period of `the Old Quantum Theory' and ushered in the new era of Quantum Mechanics. This epo…