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General spectral function expressions of a 1D correlated model

  • Solid and Condensed State Physics
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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.

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Authors and Affiliations

  1. Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USA and GCEP - Center of Physics, University of Minho, Campus Gualtar, 4710-057, Braga, Portugal

    J. M.P. Carmelo

  2. Research Institute for Solid State Physics and Optics, P.O.B. 49, 1525, Budapest, Hungary

    K. Penc

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  1. J. M.P. Carmelo
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  2. K. Penc
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Correspondence to J. M.P. Carmelo.

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Carmelo, J., Penc, K. General spectral function expressions of a 1D correlated model. Eur. Phys. J. B 51, 477–499 (2006). https://doi.org/10.1140/epjb/e2006-00235-5

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