Two Scenarios for Quantum Multifractality Breakdown

Dubertrand, Remy, García-Mata, I., Georgeot, B., Giraud, O., Lemarié, G. and Martin, J. (2014) Two Scenarios for Quantum Multifractality Breakdown. Physical Review Letters, 112 (23). p. 234101. ISSN 0031-9007

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We expose two scenarios for the breakdown of quantum multifractality under the effect of perturbations. In the first scenario, multifractality survives below a certain scale of the quantum fluctuations. In the other one, the fluctuations of the wave functions are changed at every scale and each multifractal dimension smoothly goes to the ergodic value. We use as generic examples a one-dimensional dynamical system and the three-dimensional Anderson model at the metal-insulator transition. Based on our results, we conjecture that the sensitivity of quantum multifractality to perturbation is universal in the sense that it follows one of these two scenarios depending on the perturbation. We also discuss the experimental implications.

Item Type: Article
Subjects: F300 Physics
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Related URLs:
Depositing User: Elena Carlaw
Date Deposited: 20 Nov 2019 11:56
Last Modified: 31 Jul 2021 20:33

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