Enhanced approach to calculation of cluster integrals for lattice models of matter
DOI:
https://doi.org/10.5488/cmp.29.23503Keywords:
Mayer’s expansion, reducible cluster integral, connected diagram, lattice statistics, Wheatley’s algorithmAbstract
The study is devoted to enhancing the existing techniques of calculating Mayer’s expansion cluster integrals for lattice models of matter. Two important optimizations are proposed: simplifying the calculation of the integrand at each integration point and reducing the number of such integration points due to eliminating physically identical configurations. Based on those optimizations, new data on high-order cluster integrals are obtained for a number of 2D and 3D lattice models.
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