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Spectral properties of the one-dimensional Hubbard model

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arxiv cond-mat/9312049 v1 pith:JXWJDK42 submitted 1993-12-13 cond-mat

Spectral properties of the one-dimensional Hubbard model

R. Preuss , A. Muramatsu , W. von der Linden , F.F. Assaad , W. Hanke This is my paper
classification cond-mat
keywords chargeexcitationshubbardmodelobtainedpropertiesspectralaccurately
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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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