期刊
EUROPEAN PHYSICAL JOURNAL B
卷 41, 期 2, 页码 231-254出版社
SPRINGER
DOI: 10.1140/epjb/e2004-00315-6
关键词
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We calculate high-temperature graph expansions for the Ising spin glass model with 4 symmetric random distribution functions for its nearest neighbor interaction constants J(ij). Series for the Edwards-Anderson susceptibility chi(EA) are obtained to order 13 in the expansion variable (J/(k(B)T))(2) for the general d-dimensional hyper-cubic lattice, where the parameter J determines the width of the distributions. We explain in detail how the expansions are calculated. The analysis, using the Dlog-Pade approximation and the techniques known as M1 and M2, leads to estimates for the critical threshold (J/(k(B)T(c)))(2) and for the critical exponent gamma in dimensions 4, 5, 7 and 8 for all the distribution functions. In each dimension the values for gamma agree, within their uncertainty margins, with a common value for the different distributions, thus confirming universality.
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