Renormalization-group study of the replica action for the random field Ising model
نویسندگان
چکیده
We reexamine the effective action for the d-dimensional random field Ising model derived by Brézin and De Dominicis. We find a non-Gaussian fixed point where the φ4 couplings in the action have various scaling dimensions. The correlation-length exponent in d = 6 − ǫ has the value consistent with the argument of the dimensional reduction in the leading order.
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تاریخ انتشار 1999