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• W2803781738 abstract "We consider a quench in an infinite spin ladder describing a system with two species of bosons in the limit of strong interactions. If the heavy bosonic species has infinite mass, the model becomes a spin chain with quenched binary disorder which shows true Anderson localization (AL) or many-body localization (MBL). For finite hopping amplitude ${J}^{ensuremath{'}}$ of the heavy particles, on the other hand, we find an exponential polarization decay with a relaxation rate which depends monotonically on ${J}^{ensuremath{'}}$. Furthermore, the entanglement entropy changes from a constant (AL) or logarithmic (MBL) scaling in time $t$ for ${J}^{ensuremath{'}}=0$ to a subballistic power law, ${S}_{mathrm{ent}}ensuremath{sim}{t}^{ensuremath{alpha}}$ with $ensuremath{alpha}<1$, for finite ${J}^{ensuremath{'}}$. We do not find a distinct regime in time where the dynamics for ${J}^{ensuremath{'}}ensuremath{ne}0$ shows the characteristics of an MBL phase. Instead, we discover a time regime with distinct dephasing and entanglement times, leading to dynamics in this regime which is different both from a localized and from a fully ergodic phase." @default.
• W2803781738 created "2018-06-01" @default.
• W2803781738 creator A5063151404 @default.
• W2803781738 date "2019-02-28" @default.
• W2803781738 modified "2023-10-03" @default.
• W2803781738 title "Exploration of the existence of a distinct quasi many-body localized phase: Numerical study of a translationally invariant system in the thermodynamic limit" @default.
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• W2803781738 doi "https://doi.org/10.1103/physrevb.99.075162" @default.
• W2803781738 hasPublicationYear "2019" @default.
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