I had never heard of Schrödinger's original interpretation. I am sorry to say that my quantum mechanics class was quite propagandistic towards the Copenhagen interpretation (which I personally find doubtful). It was very much of what (was it Feynman _) called the "shut up and calculate" school of quantum mechanics. What is quite interesting, of course, is that particles do "disintegrate", but they do it in a way that has no spatial extent whatsoever. In classical physics, any conceivable particle has a limited extent in space; in quantum mechanics, the wavefunction extends over all space, whereas the particle occupies no space (once we get down to leptons and quarks; of course protons and neutrons have an extent). By the way, this I do believe is true: that the wavefunction extends everywhere. Thus there is only one Hamiltonian. How this squares with Feynman's Lagrangian implementation of quantum mechanics, I have no idea. During my period of intensivierung, I believed that this single Hamiltonian is God. On Sat, Dec 10, 2022 at 1:06 PM Ernst J Meyer wrote: December 10, 2022 Dear Nikola, a) Thank you very much for your visit. b) I have found on my lap-top and tested the tone generator with the chromatic scale from 256 to 512, and when next you come, if you like, you can use that to tune the harpsichord, and then play to your heart's content. I have a library of sheet music which Nathaniel can show you. c) These URL might interest you: https://ocw.mit.edu/courses/8-04-quantum-physics-i-spring-2016/pages/video-lectures/part-1/ https://www.ratemyprofessors.com/professor?tid=562630 Not included in the lecture notes is Prof. Zwiebach's assertion that both Einstein and Schrödinger "hated" Max Born's interpretation of of the wave function, but that Born was "correct". d) https://www.azquotes.com/quotes/topics/genius-and-madness.html I've concluded that the only way I can fulfill my destiny is to cross the border. EJM