Abstract
The Handscomb Monte Carlo method is a powerful tool for the
investigation of the critical properties of quantum spin models. The
sample space in this technique is constructed over the space of ordered
Mayer's diagrams and it is the diagrammatic series of the partition
function that is calculated by means of the Monte Carlo method. In this work, we apply a damage-spreading algorithm to study the quantum S = 1/2
Heisenberg 3D ferromagnet. The damage is introduced as a perturbation in
the bond structure of the Mayer's diagrams. A cyclic Hamming distance is
shown to be closely related to the static spin susceptibility. Using a
phenomenological renormalization group analysis we show that the cyclic Hamming distance scales near T-c as NDc = L-gamma/nu g(tL(1/nu)), with nu = 0.7 and gamma/nu = 1.99. (C) 2000 Elsevier Science B.V. All rights
reserved.
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