EinsteinBrillouinKeller Action Quantization

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Einstein-Brillouin-Keller Action Quantization
(1917) (1926) (1958)
Bohr-Sommerfeld-Wilson quantization used fuzzy
math, neglecting caustics at turning points in
librations. The correct semiclassical action
quantization condition is
where
?i 0 (rotations) 1 (tunnelling)
Topological Maslov Index
2 (librations) 4 (square well)
It yields astonishingly accurate results !!!