Moment approach for the 2D attractive Hu
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J.J. Rodríguez-Núñez; C.E. Cordeiro; A. Delfino
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Article
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1996
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Elsevier Science
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English
⚖ 392 KB
We constructed the one-particle spectral functions (diagonal and off-diagonal) which reproduce BCS for weak coupling and which take into account the effect of correlations on superconductivity in the attractive Hubbard model. The diagonal spectral function is composed of three peaks and the off-diag