Geodesic
Local symmetry algebra of Shr\"odinger equation for Hydrogen atom
Teoretičeskaâ i matematičeskaâ fizika, Tome 106 (1996) no. 2, pp. 273-284

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The complete description of local symmetries (which are differential operators of arbitrary finite order) is given for stationary Shrödinger equation for Hydrogen atom. This is done using the reduction of Shrödinger equation for isotropic harmonic oscillator to one for the Hydrogen atom, which induces the correspondent symmetry algebras reduction. It is shown that all nontrivial local symmetry operators for $n$-dimensional isotropic harmonic oscillator belong to enveloping algebra $U(su(n,C))$ of algebra $su(n,C)$. For Hydrogen atom all nontrivial local symmetries constitute enveloping algebra $U(so(4,C))$ of algebra $so(4,C)$. Basis of $so(4,C)$ consists of rotation group generators and Runge–Lenz-operators. 
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     author = {A. A. Drokin and A. V. Shapovalov and I. V. Shirokov},
     title = {Local symmetry algebra of {Shr\"odinger} equation for {Hydrogen} atom},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {273--284},
     publisher = {mathdoc},
     volume = {106},
     number = {2},
     year = {1996},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1996_106_2_a7/}
}
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A. A. Drokin; A. V. Shapovalov; I. V. Shirokov. Local symmetry algebra of Shr\"odinger equation for Hydrogen atom. Teoretičeskaâ i matematičeskaâ fizika, Tome 106 (1996) no. 2, pp. 273-284. http://geodesic.mathdoc.fr/item/TMF_1996_106_2_a7/