论文标题
实验性最佳定向通过并联和反平行自旋
Experimental optimal orienteering via parallel and antiparallel spins
论文作者
论文摘要
反平行的旋转在定向方面优于平行自旋。这种有趣的现象与与量子测量而不是量子状态相关的纠缠链接。使用光子系统，我们在实验上分别实现了基于平行自旋和反平行自旋的最佳定向方案。使用光子量子步道实现了用于解码平行旋转和反平行旋转方向信息的最佳纠缠测量值，这是一个有用的想法，对量子信息处理和基础研究具有广泛的兴趣。我们的实验清楚地证明了与平行旋转在定向方中的旋转优于平行旋转的优势。此外，即使量子状态中不存在纠缠，纠缠的测量值也比本地测量值提取更多的信息。
Antiparallel spins are superior in orienteering to parallel spins. This intriguing phenomenon is tied to entanglement associated with quantum measurements rather than quantum states. Using photonic systems, we experimentally realize the optimal orienteering protocols based on parallel spins and antiparallel spins, respectively. The optimal entangling measurements for decoding the direction information from parallel spins and antiparallel spins are realized using photonic quantum walks, which is a useful idea that is of wide interest in quantum information processing and foundational studies. Our experiments clearly demonstrate the advantage of antiparallel spins over parallel spins in orienteering. In addition, entangling measurements can extract more information than local measurements even if no entanglement is present in the quantum states.
