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General spectral function expressions of a 1D correlated model

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  • J. M.P. Carmelo
  • K. Penc

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

Suggested Citation

  • J. M.P. Carmelo & K. Penc, 2006. "General spectral function expressions of a 1D correlated model," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 51(4), pages 477-499, June.
    • Handle: RePEc:spr:eurphb:v:51:y:2006:i:4:p:477-499
    DOI: 10.1140/epjb/e2006-00235-5
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