Spin-mediated particle transport in the disordered Hubbard model

@article{Protopopov2018SpinmediatedPT,
  title={Spin-mediated particle transport in the disordered Hubbard model},
  author={I. Protopopov and D. Abanin},
  journal={Physical Review B},
  year={2018},
  volume={99}
}
Motivated by the recent experiments that reported signatures of many-body localization of ultracold atoms in optical lattices [M. Schreiber {\it et al.}, Science {\bf 349}, 842 (2015)], we study dynamics of highly excited states in the strongly disordered Hubbard model in one dimension. Owing to the $SU(2)$ spin symmetry, spin degrees of freedom form a delocalized thermal bath with a narrow bandwidth. The spin bath mediates slow particle transport, eventually leading to delocalization of… Expand
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