论文标题
在具有非本地相互作用的系统中，信息争夺和纠缠和操作器动力学的对应关系
Information Scrambling and the Correspondence of Entanglement- and Operator Dynamics in Systems with Nonlocal Interactions
论文作者
论文摘要
量子信息的速度有多快，因此局部探针无法访问它是各个领域的核心。在最近与非局部相互作用的自旋系统上的作品的动机，我们研究了在Ising模型的不同变体中争夺的信息。我们的工作表明，非局部相互作用可以诱导运算符动力学，而不是由超阶相关器（OTOC）精确捕获。特别是，尽管具有高度非线性的灯酮，但操作员的尺寸在具有通用PowerLaw相互作用的系统中表现出放缓。最近提出的用于快速争夺的微观模型并未显示出这种放缓，该模型发现了量子淬灭后的统一进化下的本地操作员与纠缠熵之间的明显类比。我们的工作为当前量子仿真平台的系统的争夺性属性提供了新的见解，并补充了可能观察到实验室中量子重力特征的结果。
How fast quantum information scrambles such that it becomes inaccessible by local probes turns out to be central to various fields. Motivated by recent works on spin systems with nonlocal interactions, we study information scrambling in different variants of the Ising model. Our work reveals that nonlocal interactions can induce operator dynamics not precisely captured by out-of-time-order correlators (OTOCs). In particular, the operator size exhibits a slowdown in systems with generic powerlaw interactions despite a highly nonlinear lightcone. A recently proposed microscopic model for fast scrambling does not show this slowdown, which uncovers a distinct analogy between a local operator under unitary evolution and the entanglement entropy following a quantum quench. Our work gives new insights on scrambling properties of systems in reach of current quantum simulation platforms and complements results on possibly observing features of quantum gravity in the laboratory.
