Corpus ID: 117090877

Another Critique of the Replica Trick

  title={Another Critique of the Replica Trick},
  author={Martin R. Zirnbauer},
  journal={arXiv: Mesoscale and Nanoscale Physics},
  • M. Zirnbauer
  • Published 22 March 1999
  • Physics
  • arXiv: Mesoscale and Nanoscale Physics
Kamenev and Mezard, and Yurkevich and Lerner, have recently shown how to reproduce the large-frequency asymptotics of the energy level correlations for disordered electron systems, by doing perturbation theory around the saddles of the compact nonlinear sigma model derived from fermionic replicas. We present a critical review of their procedure and argue that its validity is limited to the perturbative regime of large frequency. The miraculous exactness of the saddle-point answer for beta = 2… Expand
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