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Investigation on the characteristics of the hubbard model
Author(s) -
Su Gang,
Ge MoLin
Publication year - 1991
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.2221640222
Subject(s) - hubbard model , unitary state , pairing , superconductivity , physics , symmetry (geometry) , theoretical physics , simple (philosophy) , supersymmetry , quantum , quantum mechanics , mathematics , philosophy , geometry , political science , law , epistemology
It is shown that a simple Hubbard model obeys supersymmetry of quantum mechanics under proper conditions in the attractive and the repulsive cases. The internal SO 4 symmetry of that Hubbard model is found to be spontaneously broken. By unitary transformations superconductivity is investigated for a t — J model within the n ‐pairing framework, and some essential results are achieved for the superconducting state.