Reconfigurable distribution of entangled states is essential for operation of quantum networks connecting multiple devices such as quantum memories and quantum computers. We introduce a quantum distribution network architecture enabling control of the entangled-state propagation direction using linear-optical devices and phase shifters and offering reconfigurable connections between multiple quantum nodes. The basic two-photon entanglement distribution scheme is first introduced to illustrate the principle of operation. The scheme is then extended to a network structure with an increased number of spatial modes connecting potential end-users. We present several examples of controllable network configuration modifications using time-dependent phase shifters.

中文翻译：

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双轨可重构光网络中可控纠缠态分布

纠缠态的可重构分布对于连接多个设备（如量子存储器和量子计算机）的量子网络的运行至关重要。我们引入了一种量子分布网络架构，能够使用线性光学器件和移相器控制纠缠态传播方向，并在多个量子节点之间提供可重新配置的连接。首先介绍基本的双光子纠缠分布方案来说明工作原理。然后将该方案扩展到具有连接潜在最终用户的更多空间模式的网络结构。我们展示了几个使用时间相关移相器的可控网络配置修改示例。