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Universal and non-universal features of the multifractality exponents of critical wave-functions

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arxiv 1101.4532 v2 pith:5HXAOWYL submitted 2011-01-24 cond-mat.dis-nn

classification cond-mat.dis-nn
keywords multifractalitycriticalensemblesmatrixorderrandomspectrumuniversal
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We calculate perturbatively the multifractality spectrum of wave-functions in critical random matrix ensembles in the regime of weak multifractality. We show that in the leading order the spectrum is universal, while the higher order corrections are model-specific. Explicit results for the anomalous dimensions are derived in the power-law and ultrametric random matrix ensembles.

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  1. How Random Are Ergodic Eigenstates of the Ultrametric Random Matrices and the Quantum Sun Model?

    quant-ph 2025-01 conditional novelty 5.0 of 10

    Extreme value statistics of Schmidt eigenvalues reveal deviations from Wishart behavior in ergodic eigenstates of ultrametric random matrices and the Quantum Sun model.

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