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Ground-state energy of the Hubbard model in the BCS approximation |
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| Authors: | Jaroslav Fabian |
| Institution: | (1) Department of Theoretical Physics, Faculty of Mathematics and Physics, Comenius University, Mlynská Dolina, 842 15 Bratislava, Slovak Republic |
| Abstract: | In the paper it is shown that it is possible to apply the BCS theory to the Hubbard model with positiveU for a half-filled band. A calculation of the ground-state energy of the model is presented. |
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