论文标题
通过光子介导的纠缠原子合奏的工程图状态
Engineering Graph States of Atomic Ensembles by Photon-Mediated Entanglement
论文作者
论文摘要
图状态是用于量子计算和量子增强测量的通用资源。他们的一代说明了对纠缠的高度控制。我们报告了原子旋转集合的连续变量图状态的生成，该图构成了图的节点。边缘代表纠缠结构，我们通过将光子腔中的全局光子介导的相互作用与局部自旋旋转相结合来对其进行编程。通过调整两个子系统之间的纠缠，我们要么在每个子系统中定位相关性，要么启用Einstein-Podolsky-Rosen转向。我们进一步设计了一个四模式方形图状态，突出了我们方法的灵活性。我们的方法可扩展到更大，更复杂的图，为基于测量的量子计算和量子计量学中的高级协议奠定了基础。
Graph states are versatile resources for quantum computation and quantum-enhanced measurement. Their generation illustrates a high level of control over entanglement. We report on the generation of continuous-variable graph states of atomic spin ensembles, which form the nodes of the graph. The edges represent the entanglement structure, which we program by combining global photon-mediated interactions in an optical cavity with local spin rotations. By tuning the entanglement between two subsystems, we either localize correlations within each subsystem or enable Einstein-Podolsky-Rosen steering. We further engineer a four-mode square graph state, highlighting the flexibility of our approach. Our method is scalable to larger and more complex graphs, laying groundwork for measurement-based quantum computation and advanced protocols in quantum metrology.
