论文标题
用rydberg原子纠缠过滤器
Entanglement filter with Rydberg atoms
论文作者
论文摘要
能够确定性地操纵光子纠缠的设备至关重要，因为光子是量子信息的理想使者。在这里，我们报告了一个基于Rydberg-Atom的纠缠过滤器，该过滤器保留了所需的光子纠缠状态，并确定性地阻止了不需要的传输。可以从任意较低初始保真度的输入状态中提取具有近义能保真度的光子纠缠。该协议本质上是强大的，并且在Rydberg封锁制度和相互作用引起的耗散方案中都取得了成功。这种纠缠滤波器通过多个rydberg原子的多个集合来开辟新的途径，通向可扩展的光子量子信息处理。
Devices capable of deterministically manipulating the photonic entanglement are of paramount importance, since photons are the ideal messengers for quantum information. Here, we report a Rydberg-atom-based entanglement filter that preserves the desired photonic entangled state and deterministically blocks the transmission of the unwanted ones. Photonic entanglement with near-unity fidelity can be extracted from an input state with an arbitrarily low initial fidelity. The protocol is inherently robust, and succeeds both in the Rydberg blockade regime and in the interaction-induced dissipation regime. Such an entanglement filter opens new routes toward scalable photonic quantum information processing with multiple ensembles of Rydberg atoms.
