Abstract
We investigate the collapse transition of lattice trees with nearest neighbor attraction in two and three dimensions. Two methods are used: (1) A stochastic optimization process of the Robbins-Monro type, which is designed solely to locate the maximum value of the specific heat; and (2) umbrella sampling, which is designed to sample data over a wide temperature range, as well as to combat the quasiergodicity of Metropolis algorithms in the collapsed phase. We find good evidence that the transition is second order with a divergent specific heat, and that the divergence of the specific heat coincides with the metric collapse.
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Madras, N., Janse van Rensburg, E.J. Monte Carlo study of the ∵-point for collapsing trees. J Stat Phys 86, 1–36 (1997). https://doi.org/10.1007/BF02180197
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DOI: https://doi.org/10.1007/BF02180197