Geodesic
Exact solution of the BCS model
Teoretičeskaâ i matematičeskaâ fizika, Tome 12 (1972) no. 2, pp. 227-238

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Interest continues to be evinced for rigorous mathematical derivations of results in the BCS model [1-7]. The present paper contains a further method of exact investigation of the BCS model; it is based on a special representation of this model's Hamiltonian. This representation enables one to transform the Hamiltonian into a second-order finitedifference operator which, in its turn, goes over in the thermodynamic limit into an elliptic differential operator that is readily amenable to investigation. 
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     author = {I. A. Bernadskii and R. A. Minlos},
     title = {Exact solution of the {BCS} model},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {227--238},
     publisher = {mathdoc},
     volume = {12},
     number = {2},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1972_12_2_a8/}
}
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I. A. Bernadskii; R. A. Minlos. Exact solution of the BCS model. Teoretičeskaâ i matematičeskaâ fizika, Tome 12 (1972) no. 2, pp. 227-238. http://geodesic.mathdoc.fr/item/TMF_1972_12_2_a8/