Loop Algorithms for Asymmetric Hamiltonians

Details Loop Algorithms for Asymmetric Hamiltonians Loop Algorithms for Asymmetric Hamiltonians

1999-07-09

arxiv.org/abs/cond-mat/9907142v2

Phys. Rev. B 61, R846 (2000)

Physics

Condensed Matter

Strongly Correlated Electrons

Replaced measurement of helicity modulus at H=2J with a measurement at H=3.95J + other small changes in the section on numeric

Scientific paper

10.1103/PhysRevB.61.R846

Generalized rules for building and flipping clusters in the quantum Monte Carlo loop algorithm are presented for the XXZ-model in a uniform magnetic field along the Z-axis. As is demonstrated for the Heisenberg antiferromagnet it is possible from these rules to select a new algorithm which performs significantly better than the standard loop algorithm in strong magnetic fields at low temperatures.

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