Many-body localization in system with a completely delocalized single-particle spectrum

Yevgeny Bar Lev, David R. Reichman, Yoav Sagi
2016 Physical review B  
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
more » ... 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.
doi:10.1103/physrevb.94.201116 fatcat:e3aqe4sujrbovmb7yly3paf7jq