Scrambling and Many-Body Localization in the XXZ-Chain
arXiv:2110.10529 · doi:10.1103/PhysRevB.105.104202
Abstract
The tripartite information is an observable-independent measure for scrambling and delocalization of information. Therefore one can expect that the tripartite information is a good observable-independent indicator for distinguishing between many-body localized and delocalized regimes, which we confirm for the XXZ-chain in a random field. Specifically, we find that the tripartite information signal spreads inside a lightcone that only grows logarithmically in time in the many-body localized regime similar to the entanglement entropy. We also find that the tripartite information eventually reaches a plateau with an asymptotic value that is suppressed by strong disorder.
Accepted version
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- Subsystem Information Capacity in Random Circuits and Hamiltonian Dynamics
- Strongly disordered Anderson insulator chains with generic two-body interaction
- Information spreading and scrambling in disorder-free multiple-spin interacting models
- Boosting entanglement growth of many-body localization by superpositions of disorder
- Localization of information driven by stochastic resetting