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Higher moments of spin-spin correlation functions for the ferromagnetic random bond Potts model | | Marc-Andre Lewis
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29 Oct 1997 | | Journal: | Eurphys. Lett. 43(2) pp.189-194 (1998) | | Subject: | Disordered Systems and Neural Networks; Statistical Mechanics | cond-mat.dis-nn cond-mat.stat-mech | | Abstract: | Using CFT techniques, we compute the disorder-averaged p-th power of the spin-spin correlation function for the ferromagnetic random bonds Potts model. We thus generalize the calculation of Dotsenko, Dotsenko and Picco, where the case p=2 was considered. Perturbative calculations are made up to the second order in epsilon (epsilon being proportional to the central charge deviation of the pure model from the Ising model value). The explicit dependence of the correlation function on $p$ gives an upper bound for the validity of the expansion, which seems to be valid, in the three-states case, only if p<=4. | | Source: | arXiv, cond-mat/9710312 | | Services: | Forum | Review | PDF | Favorites | |
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