Imaginary-chemical-potential quantum Monte Carlo method for Hubbard molecules

Imaginary-chemical-potential quantum Monte Carlo method for Hubbard molecules

We generalize the imaginary-chemical-potential quantum Monte Carlo (QMC) method proposed by Dagotto [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 mo...

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Veröffentlicht in:Physical review. E, Statistical, nonlinear, and soft matter physics Statistical, nonlinear, and soft matter physics, 2005-04, Vol.71 (4 Pt 2), p.047701-047701, Article 047701
Hauptverfasser: Lin, Fei, Smakov, Jurij, Sørensen, Erik S, Kallin, Catherine, Berlinsky, A John
Format: Artikel
Sprache:eng
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Zusammenfassung:We generalize the imaginary-chemical-potential quantum Monte Carlo (QMC) method proposed by Dagotto [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 C60 Hubbard molecule are discussed.
ISSN:1539-3755
1550-2376
DOI:10.1103/PhysRevE.71.047701