Bold Diagrammatic Monte Carlo technique for frustrated spin systems

Abstract

Using fermionic representation of spin degrees of freedom within the Popov-Fedotov approach we develop an algorithm for Monte Carlo sampling of skeleton Feynman diagrams for Heisenberg type models. Our scheme works without modifications for any dimension of space, lattice geometry, and interaction range, i.e. it is suitable for dealing with frustrated magnetic systems at finite temperature. As a practical application we compute uniform magnetic susceptibility of the antiferromagnetic Heisenberg model on the triangular lattice and compare our results with the best available high-temperature expansions. We also report results for the momentum-dependence of the static magnetic susceptibility throughout the Brillouin zone.

15 pages, 16 figures

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Cited by in corpus (6)

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• Bold Diagrammatic Monte Carlo Method Applied to Fermionized Frustrated Spins
• Stability of Dirac Liquids with Strong Coulomb Interaction
• Diagrammatic Monte Carlo study of quasi-two-dimensional Fermi-polarons
• Magnetic Correlations in the Two-dimensional Repulsive Fermi Hubbard Model
• Thermodynamic description of the Ising antiferromagnet on triangular lattice with selective dilution by modified Pair Approximation method