Kim Byungjoo, Hong Seongjin, Kim Yong-Su, Oh Kyunghwan, Lim Hyang-Tag
Opt Express. 2024 Nov 4;32(23):42031-42039. doi: 10.1364/OE.540199.
Recently, remote-controlled quantum information processing has been proposed for its applications in secure quantum processing protocols and distributed quantum networks. For remote-controlled quantum gates, the experimental realization of controlled unitary (CU) gates between any quantum gates is an essential task. Here, we propose and experimentally demonstrate a scheme for implementing CU gates between any pair of unitary gates using the polarization and time-bin degrees of freedom of single photons. Then, we experimentally implement remote-controlled single-qubit unitary gates by controlling either the state preparation or measurement of the control qubit with high process fidelities. We believe the proposed remote-controlled quantum gate model can pave the way for secure and efficient quantum information processing.
最近，远程控制量子信息处理因其在安全量子处理协议和分布式量子网络中的应用而被提出。对于远程控制量子门，在任意量子门之间实现受控酉（CU）门的实验实现是一项重要任务。在此，我们提出并通过实验证明了一种利用单光子的偏振和时间-bin自由度在任意一对酉门之间实现CU门的方案。然后，我们通过以高过程保真度控制控制量子比特的态制备或测量，实验实现了远程控制单量子比特酉门。我们相信所提出的远程控制量子门模型可为安全高效的量子信息处理铺平道路。
