Geodesic
Method of calculation of the spectrum of a centrally symmetric Hamiltonian on the basis of approximate $O_4$ and $SU_3$ symmetry
Teoretičeskaâ i matematičeskaâ fizika, Tome 8 (1971) no. 1, pp. 23-36 Cet article a éte moissonné depuis la source Math-Net.Ru

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For classical centrally symmetric problems with an arbitrary potential a study is made of all the integrals of motion that are situated in the plane of the orbit and, together with the angular momentum, form the closed Lie algebra of the groups $O_4$ and $SU_3$ (in the sense of the Poisson brackets). A solution is found to the problem of the unique construction of the invariant Casimir operators from these integrals of motion. A study is made of the problem of quantization and a method (quasiclassical in nature) is proposed for calculating the discrete spectrum of a Hamiltonian by means of the Casimir operators without recourse to the Schrödinger equation. The multiplet structure of the energy levels of the Schrödinger problem is described. 
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     author = {V. B. Serebrennikov and A. E. Shabad},
     title = {Method of calculation of the spectrum of a~centrally symmetric {Hamiltonian} on the basis of approximate $O_4$ and $SU_3$ symmetry},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
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     year = {1971},
     volume = {8},
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V. B. Serebrennikov; A. E. Shabad. Method of calculation of the spectrum of a centrally symmetric Hamiltonian on the basis of approximate $O_4$ and $SU_3$ symmetry. Teoretičeskaâ i matematičeskaâ fizika, Tome 8 (1971) no. 1, pp. 23-36. http://geodesic.mathdoc.fr/item/TMF_1971_8_1_a2/

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