Geodesic
Analytic properties of the ground-state energy in the one-dimensional Hubbard model
Teoretičeskaâ i matematičeskaâ fizika, Tome 11 (1972) no. 1, pp. 127-129

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A study is made of the analytic properties of the ground-state energy as a function of the coupling constant $c$ for a one-dimensional system of electrons described by the Hubbard Hamiltonian. It i s shown that the exact solution for the energy can be represented in the form of an asymptotic series in $c$. 
@article{TMF_1972_11_1_a12,
     author = {I. A. Misurkin and A. A. Ovchinnikov},
     title = {Analytic properties of the ground-state energy in the one-dimensional {Hubbard} model},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {127--129},
     publisher = {mathdoc},
     volume = {11},
     number = {1},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1972_11_1_a12/}
}
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I. A. Misurkin; A. A. Ovchinnikov. Analytic properties of the ground-state energy in the one-dimensional Hubbard model. Teoretičeskaâ i matematičeskaâ fizika, Tome 11 (1972) no. 1, pp. 127-129. http://geodesic.mathdoc.fr/item/TMF_1972_11_1_a12/