Spectral properties of the two-dimensional Hubbard model.
نویسندگان
چکیده
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 fulllled accurately with deviations of at most 10% only around 2k F .
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ورودعنوان ژورنال:
- Physical review. B, Condensed matter
دوره 52 5 شماره
صفحات -
تاریخ انتشار 1994