ar X iv : m at h - ph / 0 61 10 34 v 1 1 4 N ov 2 00 6 Ground state energy of the low density Hubbard model . An upper bound
نویسنده
چکیده
We derive an upper bound on the ground state energy of the 3D repulsive Hubbard model on the cubic lattice agreeing in the low density limit with the known asymptotic expression of the ground state energy of the dilute Fermi gas in the continuum. As a corollary, we prove an old conjecture on the low density behavior of the 3D Hubbard model, i.e., that the total spin of the ground state vanishes as the density goes to zero.
منابع مشابه
ar X iv : m at h - ph / 0 61 10 34 v 2 4 M ay 2 00 7 Ground state energy of the low density Hubbard model
We derive an upper bound on the ground state energy of the three-dimensional (3D) repulsive Hubbard model on the cubic lattice agreeing in the low density limit with the known asymptotic expression of the ground state energy of the dilute Fermi gas in the continuum. As a corollary, we prove an old conjecture on the low density behavior of the 3D Hubbard model, i.e., that the total spin of the g...
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تاریخ انتشار 2007