Related papers: Scar States in Deconfined $\mathbb{Z}

Scar States in Deconfined $\mathbb{Z}_2$ Lattice Gauge Theories

URL: http://arxiv.org/abs/2201.10260v3
Date: Thu, 17 Mar 2022 15:35:24 GMT
Title: Scar States in Deconfined $\mathbb{Z}_2$ Lattice Gauge Theories
Authors: Adith Sai Aramthottil, Utso Bhattacharya, Daniel Gonz\'alez-Cuadra, Maciej Lewenstein, Luca Barbiero, and Jakub Zakrzewski
Abstract summary: We show that QMBS emerge in a previously unexplored regime of a lattice gauge theory. We find a variety of scarred states far away from the regime where the model is integrable. The presence of these states is revealed both by tracing them directly from the analytically reachable limit, as well as by quantum quenches showing persistent oscillations for specific initial states.
Score: 0.0
License: http://creativecommons.org/licenses/by/4.0/
Abstract: The weak ergodicity breaking induced by quantum many-body scars (QMBS) represents an intriguing concept that has received great attention in recent years due to its relation to unusual non-equilibrium behaviour. Here we reveal that this phenomenon can occur in a previously unexplored regime of a lattice gauge theory, where QMBS emerge due to the presence of an extensive number of local constraints. In particular, by analyzing the gauged Kitaev model, we provide an example where QMBS appear in a regime where charges are deconfined. By means of both numerical and analytical approaches, we find a variety of scarred states far away from the regime where the model is integrable. The presence of these states is revealed both by tracing them directly from the analytically reachable limit, as well as by quantum quenches showing persistent oscillations for specific initial states.

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