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- W2022098712 abstract "Computer calculations of finite Hubbard chains indicate two peaks for the specific heat for a large Coulomb interaction $U$ for band fillings less than 1/2. Even though the origin of this is physically obvious, no elementary excitations with a gap energy $U$ have been explicitly demonstrated from the exact solution of the Hubbard model. We here demonstrate that there exists elementary excitation with a complex wave vector $k$ for the $Nensuremath{-}1$ spin-up case. These excitations with complex wave vectors have never been discussed previously. These results suggest similar excitations for the case with more general spin arrangements and may account for the specific-heat results." @default.
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- W2022098712 title "Exact elementary excitations with a complex wave vector in the one-dimensional Hubbard model" @default.
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- W2022098712 doi "https://doi.org/10.1103/physrevb.21.3269" @default.
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