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Defect energy of infinite-component vector spin glasses

L. W. Lee, A. P. Young

cond-mat.dis-nnarXiv:cond-mat/0505138

Abstract

We compute numerically the zero temperature defect energy, Delta E, of the vector spin glass in the limit of an infinite number of spin components m, for a range of dimensions 2 <= d <= 5. Fitting to Delta E ~ Ltheta, where L is the system size, we obtain: theta = -1.54 (d=2), theta = -1.04 (d=3), theta = -0.67 (d=4) and theta = -0.37 (d=5). These results show that the lower critical dimension, dl (the dimension where theta changes sign), is significantly higher for m=infinity than for finite m (where 2 < dl < 3).

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