Approximating observables on eigenstates of large many-body localized systems

@article{Kulshreshtha2018ApproximatingOO,
title={Approximating observables on eigenstates of large many-body localized systems},
author={Abishek K. Kulshreshtha and A. Pal and T. Wahl and S. Simon},
journal={Physical Review B},
year={2018},
volume={99},
pages={104201}
}

Eigenstates of fully many-body localized (FMBL) systems can be organized into spin algebras based on quasilocal operators called l-bits. These spin algebras define quasilocal l-bit measurement (τzi) and l-bit flip (τxi) operators. For a disordered Heisenberg spin chain in the MBL regime we approximate l-bit flip operators by finding them exactly on small windows of systems and extending them onto the whole system by exploiting their quasilocal nature. We subsequently use these operators to… Expand