Reduction of Two-Dimensional Dilute Ising Spin Glasses
Abstract
The recently proposed reduction method is applied to the Edwards-Anderson model on bond-diluted square lattices. This allows, in combination with a graph-theoretical matching algorithm, to calculate numerically exact ground states of large systems. Low-temperature domain-wall excitations are studied to determine the stiffness exponent y_2. A value of y_2=-0.281(3) is found, consistent with previous results obtained on undiluted lattices. This comparison demonstrates the validity of the reduction method for bond-diluted spin systems and provides strong support for similar studies proclaiming accurate results for stiffness exponents in dimensions d=3,...,7.
Cite
@article{arxiv.cond-mat/0503486,
title = {Reduction of Two-Dimensional Dilute Ising Spin Glasses},
author = {S. Boettcher and A. K. Hartmann},
journal= {arXiv preprint arXiv:cond-mat/0503486},
year = {2009}
}
Comments
7 pages, RevTex4, 6 ps-figures included, for related information, see http://www.physics.emory.edu/faculty/boettcher/