Exact exponents for the spin quantum Hall transition

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We consider the spin quantum Hall transition which may occur in disordered superconductors with unbroken SU(2) spin-rotation symmetry but broken time-reversal symmetry. Using supersymmetry, we map a model for this transition onto the two-dimensional percolation problem. The anisotropic limit is an sl(2|1) supersymmetric spin chain. The mapping gives exact values for critical exponents associated with disorder-averages of several observables in good agreement with recent numerical results.
5 pages, 2 figures

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Mesoscale and Nanoscale Physics, Disordered Systems and Neural Networks, Superconductivity, High Energy Physics - Theory

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http://salesiana.dossiersoluciones.com/handle/123456789/217041

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/9902063
 http://arxiv.org/abs/cond-mat/9902063
 Phys.Rev.Lett.82:4524,1999
 doi:10.1103/PhysRevLett.82.4524

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arXiv