论文标题
光子W型状态的有效融合与单身局部换门门
Efficient Fusion of Photonic W-states with Nonunitary Partial-swap Gates
论文作者
论文摘要
我们引入了一个单独的部分S-wap门，用于将任意的小型光子W型融合到没有辅助光子的情况下有效地融合到W-State的大规模纠缠网络中。基于线性光学元件的光学体系结构中设计了部分S-wap门。通过引入辅助自由度，该门提供了更高的成功概率，成本较小。我们的实现可以创建一个更大的目标状态，其设置比以前的W-State Fusion更简单。同样，所有“垃圾”状态都是可回收的，即，原则上没有完全的故障输出。
We introduce a nonunitary partial-swap gate for fusing arbitrary small-sized photonic W-states into a large-scale entangled network of W-state efficiently without ancillary photons. A partial-swap gate is designed in an optical architecture based on linear optics elements. By introducing auxiliary degree of freedom, this gate provides a higher success probability with less cost. Our implementation can create a larger target state with a simpler set-up than previous proposals for W-state fusion. Also all "garbage" states are recyclable, i.e., there is no complete failure output in our scheme in principle.
