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http://hdl.handle.net/10183/103628
Título | Simple approximation for the bethe ansatz solution of the one-dimensional fermi gas |
Autor |
Gusmao, Miguel Angelo Cavalheiro
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Abstract | We present a simple approximation scheme for the solution of the integral equations resulting from the Bethe-ansatz diagonalization of the one-dimensional Fermi gas with ô-function attraction. These equations arise for the Hubbard model with attractive interaction in the limit of weak coupling and low density. We obtain the ground-state energy as a function of coupling and density in very good agreement with numerical solutions, as well as a value for the parameter determining the gap in the magnetic excitation spectrum which strongly supports a conjecture of Larkin and Sak. |
Contido em | Physical review. B, Condensed matter. New York. Vol. 35, no. 4 (Feb. 1987), p. 1682-1686 |
Assunto |
Fisica da materia condensada
Sistemas de férmions |
Origem | Estrangeiro |
Tipo | Artigo de periódico |
URI | http://hdl.handle.net/10183/103628 |
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000112846.pdf (476.0Kb) | Texto completo (inglês) | Adobe PDF | Visualizar/abrir |
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