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Title: Spin glasses in the limit of an infinite number of spin components
Authors: Lee, L.W.
Dhar, Abhishek
Young, A.P.
Issue Date: 28-Mar-2005
Publisher: The American Physical Society
Citation: Physical Review E, 2005, Vol.71, 036146
Abstract: We consider spin glass models in which the number of spin components m is infinite. In the formulation of the problem appropriate for numerical calculations proposed by several authors, we show that the order parameter defined by the long-distance limit of the correlation functions is actually zero and there is only "quasi-long-range order" below the transition temperature. Nonetheless, there can be a finite temperature phase transition where the decay of correlations changes from exponential to power law. We also show that the spin glass transition temperature is zero in three dimensions so power-law behavior only occurs at T=0 in this case. We also argue that the order of limits, m-->[infinity] and N-->[infinity] is important, where N is the number of spins.
ISSN: 1539-3755
1550-2376 (online)
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Copyright: (2005) by the American Physical Society
Appears in Collections:Research Papers (TP)

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