Abstract
The statistics of domain walls for ground states of the 2D Ising spin glass with +1 and −1 bonds are studied for L × L square lattices with L ≤ 48, and p = 0.5, where p is the fraction of negative bonds, using periodic and/or antiperiodic boundary conditions. When L is even, almost all domain walls have energy E dw = 0 or 4. When L is odd, most domain walls have E dw = 2. The probability distribution of the entropy, S dw , is found to depend strongly on E dw . When E dw = 0, the probability distribution of |S dw | is approximately exponential. The variance of this distribution is proportional to L, in agreement with the results of Saul and Kardar. For E dw = k > 0 the distribution of S dw is not symmetric about zero. In these cases the variance still appears to be linear in L, but the average of S dw grows faster than L. This suggests a one-parameter scaling form for the L-dependence of the distributions of S dw for k> 0.
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PACS: 75.10.Nr, 75.40.Mg, 75.60.Ch, 05.50.+q
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Fisch, R. Finite-Size Scaling of the Domain Wall Entropy Distributions for the 2D ± J Ising Spin Glass. J Stat Phys 125, 793–803 (2006). https://doi.org/10.1007/s10955-006-9223-7
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DOI: https://doi.org/10.1007/s10955-006-9223-7