Reduction of Two-Dimensional Dilute Ising Spin Glasses

Details Reduction of Two-Dimensional Dilute Ising Spin Glasses Reduction of Two-Dimensional Dilute Ising Spin Glasses

2005-03-18

arxiv.org/abs/cond-mat/0503486v1

Physical Review B 72, 014429 (2005).

Physics

Condensed Matter

Disordered Systems and Neural Networks

7 pages, RevTex4, 6 ps-figures included, for related information, see http://www.physics.emory.edu/faculty/boettcher/

Scientific paper

10.1103/PhysRevB.72.014429

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.

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