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- W2142830575 abstract "We calculate the one-electron spectral function of the attractive (negative-$U)$ Hubbard model. We work in the intermediate-coupling and low-density regime and obtain the self-energy in an approximate analytical form. The excitation spectrum is found to consist of three branches. The results are obtained in a framework based on the self-consistent $T$-matrix approximation, which is compatible with the Mermin-Wagner theorem." @default.
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- W2142830575 date "1998-03-01" @default.
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- W2142830575 title "One-electron spectral functions of the attractive Hubbard model for intermediate coupling" @default.
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- W2142830575 doi "https://doi.org/10.1103/physrevb.57.5995" @default.
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