Eigenvalue analysis of the density matrix of four-dimensional spin glasses supports replica symmetry breaking

@article{Correale2002EigenvalueAO,
  title={Eigenvalue analysis of the density matrix of four-dimensional spin glasses supports replica symmetry breaking},
  author={Luca Correale and Enzo Marinari and Victor Martin-Mayor},
  journal={Physical Review B},
  year={2002},
  volume={66},
  pages={174406}
}
We present a general and powerful numerical method useful to study the density matrix of spin models. We apply the method to finite-dimensional spin glasses, and analyze in detail the four-dimensional EdwardsAnderson model with Gaussian quenched random couplings. Our results clearly support the existence of replica symmetry breaking in the thermodynamical limit. 
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