Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2003-11-04
Physics
Condensed Matter
Strongly Correlated Electrons
25 pages, no figures
Scientific paper
We introduce a method that allows the evaluation of general expressions for the spectral functions of the one-dimensional Hubbard model for all values of the on-site electronic repulsion U. The spectral weights are expressed in terms of pseudofermion operators such that the spectral functions can be written as a convolution of pseudofermion dynamical correlation functions. Our results are valid for all finite energy and momentum values and are used elsewhere in the study of the unusual finite-energy properties of quasi-one-dimensional compounds and the new quantum systems of ultra-cold fermionic atoms on an optical lattice.
Carmelo Jose. M. P.
Penc Karlo
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