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Finite Size Scaling in the tt'-Hubbard Model and in BCS-Reduced Hubbard Models

Fettes, Werner ; Morgenstern, Ingo


With the projector quantum Monte Carlo algorithm and the stochastic diagonalization it is possible to calculate the ground state of the Hubbard model for small finite clusters. Nevertheless the usual finite size scaling of the Hubbard model has problems of deducing the behavior of the infinite system correctly from the numerical data of small system sizes. Therefore we study the finite size ...


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