论文标题
观察玻色中的多体疤痕 - 加值量子量子模拟器
Observation of many-body scarring in a Bose--Hubbard quantum simulator
论文作者
论文摘要
不断寻求理解复杂量子系统的非平衡动力学的追求是统计物理学的基础以及量子技术的发展。量子多体疤痕最近通过在特殊初始状态（例如$ \ mathbb {z} _2 $状态在rydberg atom系统中制备系统，为延迟热化的新机制打开了一个新的机制。在这里，我们意识到来自以前未知的初始条件（例如单位填充状态）在玻色扣量子模拟器中进行多体疤痕。我们开发了一种用于测量纠缠熵的量子干扰方案，并证明疤痕会使多体系统捕获在低进入子空间中。我们的工作使疤痕的资源可用于一类广泛的超级原子实验，它允许人们探索疤痕与晶格理论，希尔伯特空间片段化和无序定位中受约束动态的关系。
The ongoing quest for understanding nonequilibrium dynamics of complex quantum systems underpins the foundation of statistical physics as well as the development of quantum technology. Quantum many-body scarring has recently opened a window into novel mechanisms for delaying the onset of thermalization by preparing the system in special initial states, such as the $\mathbb{Z}_2$ state in a Rydberg atom system. Here we realize many-body scarring in a Bose-Hubbard quantum simulator from previously unknown initial conditions such as the unit-filling state. We develop a quantum-interference protocol for measuring the entanglement entropy and demonstrate that scarring traps the many-body system in a low-entropy subspace. Our work makes the resource of scarring accessible to a broad class of ultracold-atom experiments, and it allows one to explore the relation of scarring to constrained dynamics in lattice gauge theories, Hilbert space fragmentation, and disorder-free localization.
