General spectral function expressions of a 1D correlated model

J. M.P. Carmelo () and K. Penc

The European Physical Journal B: Condensed Matter and Complex Systems, 2006, vol. 51, issue 4, 477-499

Abstract: 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. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2006

Keywords: 71.10.Fd Lattice fermion models (Hubbard model, etc.), 71.27.+a Strongly correlated electron systems; heavy fermions , (search for similar items in EconPapers)
Date: 2006
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DOI: 10.1140/epjb/e2006-00235-5

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