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- W2043930471 abstract "The physics of the one-dimensional t-J model may be determined at J/tensuremath{rightarrow}0 (i.e., the U/tensuremath{rightarrow}ensuremath{infty} limit of the repulsive Hubbard model) and at J/t=2 with the use of the Bethe ansatz. To get a full understanding of the charge and spin correlation functions for all values of J/t, one has to resort to numerical methods. We have used two numerical methods (the world-line quantum Monte Carlo algorithm and the quantum transfer-matrix algorithm) to get information on charge and spin static structure factors, pairing correlations, and critical exponents. The (1+1)-dimensional classical system corresponding to the one-dimensional t-J model, on which the Monte Carlo technique is used, is identified to a fifteen-vertex model. We show that the t-J model undergoes phase separation at large values of J/t. Before phase separation, both critical exponents and pairing correlations in the extended s-wave channel favor the onset of superconductivity. For low values of J/t, the model shows a U/tensuremath{rightarrow}ensuremath{infty} Hubbard-like character." @default.
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- W2043930471 date "1991-08-01" @default.
- W2043930471 modified "2023-09-24" @default.
- W2043930471 title "Charge and spin structures in the one-dimensionalt-Jmodel" @default.
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- W2043930471 doi "https://doi.org/10.1103/physrevb.44.2681" @default.
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