Simple approximation for the bethe ansatz solution of the one-dimensional fermi gas
dc.contributor.author | Gusmao, Miguel Angelo Cavalheiro | pt_BR |
dc.date.accessioned | 2014-09-23T02:12:27Z | pt_BR |
dc.date.issued | 1987 | pt_BR |
dc.identifier.issn | 0163-1829 | pt_BR |
dc.identifier.uri | http://hdl.handle.net/10183/103628 | pt_BR |
dc.description.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. | en |
dc.format.mimetype | application/pdf | |
dc.language.iso | eng | pt_BR |
dc.relation.ispartof | Physical review. B, Condensed matter. New York. Vol. 35, no. 4 (Feb. 1987), p. 1682-1686 | pt_BR |
dc.rights | Open Access | en |
dc.subject | Física da matéria condensada | pt_BR |
dc.subject | Sistemas de férmions | pt_BR |
dc.title | Simple approximation for the bethe ansatz solution of the one-dimensional fermi gas | pt_BR |
dc.type | Artigo de periódico | pt_BR |
dc.identifier.nrb | 000112846 | pt_BR |
dc.type.origin | Estrangeiro | pt_BR |
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