Einstein and the old quantum theory
History and Philosophy of Physics
2021-12-30 v1
Abstract
Objecting that Sommerfeld's quantum conditions refer to particular coordinates, Einstein proposes a canonically invariant rule. But even if the invariance is canonical, Einstein may have in mind a double \emph{configuration} space invariance: with respect to loop deformations, and to \emph{point} transformation -- all on a torus where features of the Liouville-Arnol'd theorem already appear.
Cite
@article{arxiv.2112.14194,
title = {Einstein and the old quantum theory},
author = {Alexander Afriat},
journal= {arXiv preprint arXiv:2112.14194},
year = {2021}
}