论文标题
量子多体疤痕的命运在存在的情况下
The fate of quantum many-body scars in the presence of disorder
论文作者
论文摘要
在强烈相互作用的Rydberg原子上进行的实验表明，局部可观察物的持续振荡令人惊讶。这些振荡已归因于一组特殊的非菌状态，称为量子多体疤痕。尽管已经投入了大量研究来了解这些特殊状态，但尚不清楚疤痕状态如何抵抗混乱。我们通过在存在障碍存在下相互作用的Rydberg原子的模型的磁化和时空相关因素来研究这个问题。尽管随着疾病强度的增加，这些可观察到的物体衰减的振荡振幅，但它们的振荡频率仍然非常恒定。我们表明，这种稳定性源于无序频谱的共鸣，该光谱大约以清洁系统的相同疤痕能量为中心。我们还发现，由于存在障碍的存在并进一步增强了振荡振幅，因此可以访问多组疤痕共振。我们的结果表明，在疤痕系统中，非连接动力学的鲁棒性，并为了解实验现实系统的行为打开了大门。
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.
