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Transformations of the Hubbard Model
Author(s) -
Mertsching J.
Publication year - 1977
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220820132
Subject(s) - hubbard model , antiferromagnetism , condensed matter physics , connection (principal bundle) , superconductivity , physics , magnetic field , transformation (genetics) , field (mathematics) , quantum mechanics , mathematics , chemistry , pure mathematics , geometry , biochemistry , gene
The significance of some transformations of the Hubbard model with an arbitrarily occupied symmetric band in a magnetic field is studied. The repulsion‐attraction transformation yields nontrivial relations between solutions of the Hubbard model with a positive and a negative correlation energy, respectively. As an example, the connection between an antiferromagnet in a magnetic field and a superconductor with a non‐half‐filled band is discussed.