Markovian baths and quantum avalanches
Disordered Systems and Neural Networks
2022-07-28 v1 Statistical Mechanics
Quantum Physics
Abstract
In this work I will discuss some numerical results on the stability of the many-body localized phase to thermal inclusions. The work simplifies a recent proposal by Morningstar et al. [arXiv:2107.05642] and studies small disordered spin chains which are perturbatively coupled to a Markovian bath. The critical disorder for avalanche stability of the canonical disordered Heisenberg chain is shown to exceed W>20. In stark contrast to the Anderson insulator, the avalanche threshold drifts considerably with system size, with no evidence of saturation in the studied regime. I will argue that the results are most easily explained by the absence of a many-body localized phase.
Cite
@article{arxiv.2108.10796,
title = {Markovian baths and quantum avalanches},
author = {Dries Sels},
journal= {arXiv preprint arXiv:2108.10796},
year = {2022}
}