Low-dimensional correlated particle systems: Exact results for groundstate and thermodynamic quantities

  • A. Klümper
Conference paper
Part of the Lecture Notes in Physics book series (LNP, volume 477)


A one-dimensional fermion model with bond charge-interactions as well as Hubbard-type interactions is investigated exactly. The large distance asymptotics of the density-density and pair correlations are calculated. The system shows Luther-Emery liquid behaviour with a crossover from a density-density dominated regime to one with dominant pair correlations. Furthermore, the integrable tJ chain is studied at finite temperatures. Some concepts for this analysis are introduced, notably the Trotter-Suzuki mapping and the quantum transfer matrix. Finally, the specific heat is presented and its structure discussed.


71.28.+d 74.20.-z 75.10.Lp 


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Copyright information

© Springer-Verlag 1996

Authors and Affiliations

  • A. Klümper
    • 1
  1. 1.Institut für Theoretische PhysikUniversität zu KölnKöln 41Germany

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