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Zeitschrift für Physik B Condensed Matter

, Volume 89, Issue 2, pp 187–194 | Cite as

Weak coupling analysis of the optical conductivity of the two dimensional Hubbard model

  • W. Brenig
Original Contributions

Abstract

We analyze the dynamical conductivity at zero momentum transfer of the two dimensional Hubbard model applying a projection technique approach in Liouville space. In the limit of small correlation strength we present a perturbative evaluation of the relevant current selfenergy and the isothermal current susceptibility using a novel real space summation technique. A dicussion of our results for the zero frequency Drude weight, the finite frequency relaxation rate and the incoherent spectrum of the optical conductivity at various filling densities and for zero temperature will be given.

Keywords

Relaxation Rate Weak Coupling Real Space Optical Conductivity Frequency Relaxation 
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Copyright information

© Springer-Verlag 1992

Authors and Affiliations

  • W. Brenig
    • 1
  1. 1.Institut für Theoretische PhysikUniversität zu KölnKöln 41Federal Republic of Germany

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