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Media type:
E-Article;
Text
Title:
The critical exponents of the two-dimensional Ising spin glass revisited: Exact Ground State Calculations and Monte Carlo Simulations
Contributor:
Rieger, Heiko
[Author];
Santen, Ludger
[Author];
Blasum, Ulrich
[Author];
Diehl, Martin
[Author];
Jünger, Michael
[Author];
Rinaldi, Giovanni
[Author]
imprint:
IOP Publ., 1996
Language:
German;
English
Origination:
Footnote:
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Description:
The critical exponents for T -> 0 of the two-dimensional Ising spin glass model with Gaussian couplings are determined with the help of exact ground states for system sizes up to L=50 and by a Monte Carlo study of a pseudo-ferromagnetic order parameter. We obtain: for the stiffness exponent y(= heta)=-0.281 ±0.002 , for the magnetic exponent delta=1.48 ±0.01 and for the chaos exponent zeta=1.05 ±0.05 . From Monte Carlo simulations we get the thermal exponent u=3.6 ±0.2 . The scaling prediction y=-1/u is fulfilled within the error bars, whereas there is a disagreement with the relation y=1-delta .