Imaginary chemical potential quantum Monte Carlo for Hubbard molecules

Details Imaginary chemical potential quantum Monte Carlo for Hubbard molecules Imaginary chemical potential quantum Monte Carlo for Hubbard molecules

2004-12-22

arxiv.org/abs/cond-mat/0412641v2

Phys. Rev. E 71, 047701 (2005)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures, RevTeX4

Scientific paper

10.1103/PhysRevE.71.047701

We generalize the imaginary chemical potential quantum Monte Carlo (QMC) method proposed by Dagotto et al. [Phys. Rev. B 41, R811 (1990)] to systems without particle-hole symmetry. The generalized method is tested by comparing the results of the QMC simulations and exact diagonalization on small Hubbard molecules, such as tetrahedron and truncated tetrahedron. Results of the application of the method to the C$_{60}$ Hubbard molecule are discussed.

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