Physics – Chemical Physics
Scientific paper
1996-03-29
Physics
Chemical Physics
37 pages including 3 poscript figures, submitted to Phys. Rev. A
Scientific paper
10.1103/PhysRevA.54.1820
Despite the seminal connection between classical multiply-periodic motion and Heisenberg matrix mechanics and the massive amount of work done on the associated problem of semiclassical (EBK) quantization of bound states, we show that there are, nevertheless, a number of previously unexploited aspects of this relationship that bear on the quantum-classical correspondence. In particular, we emphasize a quantum variational principle that implies the classical variational principle for invariant tori. We also expose the more indirect connection between commutation relations and quantization of action variables. With the help of several standard models with one or two degrees of freedom, we then illustrate how the methods of Heisenberg matrix mechanics described in this paper may be used to obtain quantum solutions with a modest increase in effort compared to semiclassical calculations. We also describe and apply a method for obtaining leading quantum corrections to EBK results. Finally, we suggest several new or modified applications of EBK quantization.
Greenberg Wm. R.
Klein Abraham
Li Chao-Te
Zlatev Ivalyo
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