TY - JOUR
T1 - Two Scenarios for Quantum Multifractality Breakdown
AU - Dubertrand, Remy
AU - Garcia-Mata, Ignacio
AU - Georgeot, Bertrand
AU - Giraud, Olivier
AU - Lemarie, G.
AU - Martin, J.
PY - 2014/6/10
Y1 - 2014/6/10
N2 - 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.
AB - 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.
U2 - 10.1103/PhysRevLett.112.234101
DO - 10.1103/PhysRevLett.112.234101
M3 - Article
SN - 0031-9007
VL - 112
JO - Physical Review Letters
JF - Physical Review Letters
IS - 23
M1 - 234101
ER -