An integrable 3D lattice model with positive Boltzmann weights

Vladimir V. Mangazeev, Vladimir V. Bazhanov, Sergey Sergeev

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    In this paper we construct a three-dimensional (3D) solvable lattice model with non-negative Boltzmann weights. The spin variables in the model are assigned to edges of the 3D cubic lattice and run over an infinite number of discrete states. The Boltzmann weights satisfy the tetrahedron equation, which is a 3D generalization of the Yang–Baxter equation. The weights depend on a free parameter 0 < q < 1 and three continuous field variables. The layer-to-layer transfer matrices of the model form a two-parameter commutative family. This is the first example of a non-trivial solvable 3D lattice model with non-negative Boltzmann weights.
    Original languageEnglish
    Pages (from-to)1-16
    Number of pages16
    JournalJournal of Physics A: Mathematical and Theoretical
    Issue number46
    Publication statusPublished - 22 Nov 2013


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