A quantum Monte Carlo algorithm for softcore boson systems

Details A quantum Monte Carlo algorithm for softcore boson systems A quantum Monte Carlo algorithm for softcore boson systems

2003-01-22

arxiv.org/abs/cond-mat/0301416v1

Phys. Rev. E 68, 046708 (2003)

Physics

Condensed Matter

Statistical Mechanics

Submitted to Phys. Rev. E (Rapid Communications)

Scientific paper

10.1103/PhysRevE.68.046708

An efficient Quantum Monte Carlo algorithm for the simulation of bosonic systems on a lattice in a grand canonical ensemble is proposed. It is based on the mapping of bosonic models to the spin models in the limit of the infinite total spin quantum number. It is demonstrated, how this limit may be taken explicitly in the algorithm, eliminating the systematic errors. The efficiency of the algorithm is examined for the non-interacting lattice boson model and compared with the stochastic series expansion method with the heat-bath type scattering probability of the random walker.

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