Nature of perturbation theory in spin glasses

J. Yeo; M. A. Moore; T. Aspelmeier

doi:10.1088/0305-4470/38/18/011

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Nature of perturbation theory in spin glasses

J. Yeo·M. A. Moore·T. Aspelmeier

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Abstract

The high-order behavior of the perturbation expansion in the cubic replica field theory of spin glasses in the paramagnetic phase has been investigated. The study starts with the zero-dimensional version of the replica field theory and this is shown to be equivalent to the problem of finding finite size corrections in a modified spherical spin glass near the critical temperature. We find that the high-order behavior of the perturbation series is described, to leading order, by coefficients of alternating signs (suggesting that the cubic field theory is well-defined) but that there are also subdominant terms with a complicated dependence of their sign on the order. Our results are then extended to the d-dimensional field theory and in particular used to determine the high-order behavior of the terms in the expansion of the critical exponents in a power series in epsilon=6-d. We have also corrected errors in the existing epsilon expansions at third order.

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J. Yeo, M. A. Moore, T. Aspelmeier. 2005-01-18. Nature of perturbation theory in spin glasses. https://doi.org/10.1088/0305-4470%2F38%2F18%2F011

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