利用单光子源的多粒子纠缠制备与受控量子通信

Preparation of Multipartite Entanglement with Single Photon Sources and Controlled Quantum Communication

提出一种将三光子制备于特定纠缠态的方案。该方案涉及Hadamard门和受控非门,可利用线性光学器件和光子探测器来实现,具有实验可行性。然后该三光子纠缠态被用来实现受控的量子通信任务,包括量子密钥分配和量子安全直接通信。

A scheme for preparing three photons in the particular entangled state by using single photon sources is proposed.In the presented scheme,one can use linear optics and photon detectors to implement Hadamard and controlled-NOT gates.The scheme is feasible with current technologies.Then controlled quantum communication tasks,including quantum key distribution and quantum secure direct communication,using the three-photon entangled state are shown.