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arXiv · 2102.13215

Many-body localization of 1D disordered impenetrable two-component fermions

M. S. Bahovadinov·D. V. Kurlov·B. L. Altshuler·G. V. Shlyapnikov
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Abstract

We study effects of disorder on eigenstates of 1D two-component fermions with infinitely strong Hubbard repulsion. We demonstrate that the spin-independent (potential) disorder reduces the problem to the one-particle Anderson localization taking place at arbitrarily weak disorder. In contrast, a random magnetic field can cause reentrant many-body localization-delocalization transitions. Surprisingly weak magnetic field destroys one-particle localization caused by not too strong potential disorder, whereas at much stronger fields the states are many-body localized. We present numerical support of these conclusions.

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M. S. Bahovadinov, D. V. Kurlov, B. L. Altshuler, G. V. Shlyapnikov. 2021-02-25. Many-body localization of 1D disordered impenetrable two-component fermions. https://doi.org/10.1140/epjd%2Fs10053-022-00440-4

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