The fate of quantum many-body scars in the presence of disorder
- URL: http://arxiv.org/abs/2010.10535v1
- Date: Tue, 20 Oct 2020 18:00:02 GMT
- Title: The fate of quantum many-body scars in the presence of disorder
- Authors: Ian Mondragon-Shem, Maxim G. Vavilov, Ivar Martin
- Abstract summary: We show that resonances in the disordered spectrum that are approximately centered at the same scar energies of the clean system remain remarkably constant.
Multiple additional sets of scar resonances become due to the presence of disorder and further enhance the oscillation amplitudes.
Our results show robustness of non-ergodic dynamics in scar systems, and opens the door to understanding the behavior of experimentally realistic systems.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Experiments performed on strongly interacting Rydberg atoms have revealed
surprising persistent oscillations of local observables. These oscillations
have been attributed to a special set of non-ergodic states, referred to as
quantum many-body scars. Although a significant amount of research has been
invested to understand these special states, it has remained unclear how stable
scar states are against disorder. We address this question by studying
numerically and analytically the magnetization and spatio-temporal correlators
of a model of interacting Rydberg atoms in the presence of disorder. While the
oscillation amplitudes of these observables decay with time as the disorder
strength is increased, their oscillation frequency remains remarkably constant.
We show that this stability stems from resonances in the disordered spectrum
that are approximately centered at the same scar energies of the clean system.
We also find that multiple additional sets of scar resonances become accessible
due to the presence of disorder and further enhance the oscillation amplitudes.
Our results show the robustness of non-ergodic dynamics in scar systems, and
opens the door to understanding the behavior of experimentally realistic
systems.
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