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arXiv · 1607.04652

Many-Body Localization in System with a Completely Delocalized Single-Particle Spectrum

Yevgeny Bar Lev·David R. Reichman·Yoav Sagi
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Abstract

Many-body localization (MBL) in a one-dimensional Fermi Hubbard model with random on-site interactions is studied. While for this model all single-particle states are trivially delocalized, it is shown that for sufficiently strong disordered interactions the model is many-body localized. It is therefore argued that MBL does not necessary rely on localization of the single-particle spectrum. This model provides a convenient platform to study pure MBL phenomenology, since Anderson localization in this model does not exist. By examining various forms of the interaction term a dramatic effect of symmetries on charge transport is demonstrated. A possible realization in a cold atom experiments is proposed.

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Yevgeny Bar Lev, David R. Reichman, Yoav Sagi. 2016-07-08. Many-Body Localization in System with a Completely Delocalized Single-Particle Spectrum. https://doi.org/10.1103/physrevb.94.201116

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