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Open Quantum Systems Decoherence

Markovian baths and quantum avalanches

arXiv
Authors: Dries Sels

Year

2021

Paper ID

62133

Status

Preprint

Abstract Read

~2 min

Abstract Words

104

Citations

N/A

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.

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  • In this work I will discuss some numerical results on the stability of the many-body localized phase to thermal inclusions.

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