Diagrammatic damage spreading in the quantum Heisenberg ferromagnet

U.M.s Costa, A.f de Souza and M.l Lyra

Physica A: Statistical Mechanics and its Applications, 2000, vol. 283, issue 1, 42-47

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=12 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 Tc as NDc=Lγ/νg(tL1/ν), with ν=0.7 and γ/ν=1.99.

Keywords: Spreading of damage; Heisenberg model (search for similar items in EconPapers)
Date: 2000
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:283:y:2000:i:1:p:42-47

DOI: 10.1016/S0378-4371(00)00125-4

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