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Pocket Monte Carlo algorithm for classical doped dimer models
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DOI：10.1103/PhysRevB.67.064503.png)
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Abstract
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We study the correlations of classical hard-core dimer models doped with monomers by Monte Carlo simulation. We introduce an efficient cluster algorithm, which is applicable in any dimension, for different lattices and arbitrary doping. We use this algorithm for the dimer model on the square lattice, where a finite density of monomers destroys the critical confinement of the two-monomer problem. The monomers form a two-component plasma located in its high-temperature phase, with the Coulomb interaction screened at finite densities. On the triangular lattice, a single pair of monomers is not confined. The monomer correlations are extremely short ranged and hardly change with doping.
Keywords:
VALENCE-BOND STATE
TRIANGULAR LATTICE
ISING-MODELS
PHASE
SUPERCONDUCTIVITY
MIXTURES
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