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Spectral properties of the one-dimensional Hubbard model

R. Preuss·A. Muramatsu·W. von der Linden·F. F. Assaad·W. Hanke
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Abstract

The spectral properties of the 1-D Hubbard model are obtained from quantum Monte Carlo simulations using the maximum entropy method. The one-particle excitations are characterized by dispersive cosine-like bands. Velocities for spin- and charge excitations are obtained that lead to a conformal charge c=0.98 +/- 0.05 for the largest system simulated (N=84). An exact sum-rule for the spin-excitations is fulfilled accurately with deviations of at most 10% only around 2 kF.

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R. Preuss, A. Muramatsu, W. von der Linden, F. F. Assaad, W. Hanke. 1993-12-13. Spectral properties of the one-dimensional Hubbard model. https://doi.org/10.1103/physrevlett.73.732

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