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Title: Multifractality and quantum diffusion from self-consistent theory of localization

Abstract

Multifractal properties of wave functions in a disordered system can be derived from self-consistent theory of localization by Vollhardt and Wölfle. A diagrammatic interpretation of results allows to obtain all scaling relations used in numerical experiments. The arguments are given that the one-loop Wegner result for a space dimension d = 2 + ϵ is exact, so the multifractal spectrum is strictly parabolical. The σ-models are shown to be deficient at the four-loop level and the possible reasons of that are discussed. The extremely slow convergence to the thermodynamic limit is demonstrated. The open question on the relation between multifractality and a spatial dispersion of the diffusion coefficient D(ω, q) is resolved in the compromise manner due to ambiguity of the D(ω, q) definition. Comparison is made with the extensive numerical material.

Authors:
 [1]
  1. Kapitza Institute for Physical Problems (Russian Federation)
Publication Date:
OSTI Identifier:
22471994
Resource Type:
Journal Article
Journal Name:
Journal of Experimental and Theoretical Physics
Additional Journal Information:
Journal Volume: 121; Journal Issue: 5; Other Information: Copyright (c) 2015 Pleiades Publishing, Inc.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1063-7761
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COMPARATIVE EVALUATIONS; CONVERGENCE; DIFFUSION; DISPERSIONS; QUANTUM MECHANICS; SPACE; WAVE FUNCTIONS

Citation Formats

Suslov, I. M., E-mail: suslov@kapitza.ras.ru. Multifractality and quantum diffusion from self-consistent theory of localization. United States: N. p., 2015. Web. doi:10.1134/S1063776115110096.
Suslov, I. M., E-mail: suslov@kapitza.ras.ru. Multifractality and quantum diffusion from self-consistent theory of localization. United States. https://doi.org/10.1134/S1063776115110096
Suslov, I. M., E-mail: suslov@kapitza.ras.ru. 2015. "Multifractality and quantum diffusion from self-consistent theory of localization". United States. https://doi.org/10.1134/S1063776115110096.
@article{osti_22471994,
title = {Multifractality and quantum diffusion from self-consistent theory of localization},
author = {Suslov, I. M., E-mail: suslov@kapitza.ras.ru},
abstractNote = {Multifractal properties of wave functions in a disordered system can be derived from self-consistent theory of localization by Vollhardt and Wölfle. A diagrammatic interpretation of results allows to obtain all scaling relations used in numerical experiments. The arguments are given that the one-loop Wegner result for a space dimension d = 2 + ϵ is exact, so the multifractal spectrum is strictly parabolical. The σ-models are shown to be deficient at the four-loop level and the possible reasons of that are discussed. The extremely slow convergence to the thermodynamic limit is demonstrated. The open question on the relation between multifractality and a spatial dispersion of the diffusion coefficient D(ω, q) is resolved in the compromise manner due to ambiguity of the D(ω, q) definition. Comparison is made with the extensive numerical material.},
doi = {10.1134/S1063776115110096},
url = {https://www.osti.gov/biblio/22471994}, journal = {Journal of Experimental and Theoretical Physics},
issn = {1063-7761},
number = 5,
volume = 121,
place = {United States},
year = {Sun Nov 15 00:00:00 EST 2015},
month = {Sun Nov 15 00:00:00 EST 2015}
}