Purification and many-body localization in cold atomic gases
Abstract
We propose to observe many-body localization in cold atomic gases by realizing a Bose-Hubbard chain with binary disorder and studying its non-equilibrium dynamics. In particular, we show that measuring the difference in occupation between even and odd sites, starting from a prepared density-wave state, provides clear signatures of localization. As hallmarks of the many-body localized phase we confirm, furthermore, a logarithmic increase of the entanglement entropy in time and Poissonian level statistics. Our numerical density-matrix renormalization group calculations for infinite system size are based on a purification approach; this allows us to perform the disorder average exactly, thus producing data without any statistical noise and with maximal simulation times of up to a factor 10 longer than in the clean case.
Cite
@article{arxiv.1407.4251,
title = {Purification and many-body localization in cold atomic gases},
author = {F. Andraschko and T. Enss and J. Sirker},
journal= {arXiv preprint arXiv:1407.4251},
year = {2014}
}
Comments
published version