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arXiv · 1501.03824

Many-body mobility edge due to symmetry-constrained dynamics and strong interactions

Ian Mondragon-Shem·Arijeet Pal·Taylor L. Hughes·Chris R. Laumann
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Abstract

We provide numerical evidence combined with an analytical understanding of the many-body mobility edge for the strongly anisotropic spin-1/2 XXZ model in a random magnetic field. The system dynamics can be understood in terms of symmetry-constrained excitations about parent states with ferromagnetic and anti-ferromagnetic short range order. These two regimes yield vastly different dynamics producing an observable, tunable many-body mobility edge. We compute a set of diagnostic quantities that verify the presence of the mobility edge and discuss how weakly correlated disorder can tune the mobility edge further.

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Ian Mondragon-Shem, Arijeet Pal, Taylor L. Hughes, Chris R. Laumann. 2015-01-15. Many-body mobility edge due to symmetry-constrained dynamics and strong interactions. https://doi.org/10.1103/physrevb.92.064203

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