Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
1992-05-26
Physics
High Energy Physics
High Energy Physics - Lattice
33 pages, GUTPA/91/11-1:
Scientific paper
10.1103/PhysRevB.46.469
We present a new technique for a numerical analysis of the phase structure of the 2D Hubbard model as a function of the hole chemical potential. The grand canonical partition function for the model is obtained via Monte Carlo simulations. The dependence of the hole occupation number on the chemical potential and the temperature is evaluated. These calculations, together with a study of the Yang-Lee zeros of the grand canonical partition function, show evidence of a phase transition at zero temperature and particle density below half-filling. The binding energy of a pair of holes is calculated in the low temperature regime and the possibility for pairing is explored.
Barbour I. M.
Klepfish E. G.
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