Quantum lattice Boltzmann study of random-mass Dirac fermions in one dimension
Abstract
We study the time evolution of quenched random-mass Dirac fermions in one dimension by quantum lattice Boltzmann simulations. For nonzero noise strength, the diffusion of an initial wave packet stops after a finite time interval, reminiscent of Anderson localization. However, instead of exponential localization we find algebraically decaying tails in the disorder-averaged density distribution. These qualitatively match x-3/2 decay, which has been predicted by analytic calculations based on zero-energy solutions of the Dirac equation.
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