Journal article
Imaginary-chemical-potential quantum Monte Carlo method for Hubbard molecules
Abstract
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.
Authors
Lin F; Šmakov J; Sørensen ES; Kallin C; Berlinsky AJ
Journal
Physical Review E, Vol. 71, No. 4,
Publisher
American Physical Society (APS)
Publication Date
April 2005
DOI
10.1103/physreve.71.047701
ISSN
2470-0045