Deterministic quantum teleportation through fiber channels.

Deterministic quantum teleportation through fiber channels.
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通过光纤通道的确定性量子隐形传态

DOI:
10.1126/sciadv.aas9401
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发表时间:
2018-10
期刊:
影响因子:
13.6
通讯作者:
Peng K
Peng K
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Huo M;Qin J;Cheng J;Yan Z;Qin Z;Su X;Jia X;Xie C;Peng K

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利用连续可变纠缠实现了光模在6.0公里光纤信道上的确定性隐形传输。量子隐形传态是指通过发送方和接收方共享的非局域纠缠,在一定距离内将未知的量子态从一个站点传输到另一个站点的过程,已被广泛应用于量子通信和量子计算中。光纤是重要的信息通道,但通过光纤实现连续可变光模式的隐形传输至今尚未实现。在这里,我们实验演示了光相干态通过光纤通道的确定性量子隐形传态。通过一根3.0公里长的光纤,将爱因斯坦-蒲多尔斯基-罗森纠缠态的两个子模分配给发送者和接收者,作为量子资源。实现了光模在6.0公里光纤信道上的确定性隐形传输。恢复的量子态的保真度为0.62±0.03,突破了经典的1/2极限,为在通信网络中实现确定性量子隐形传态提供了一种可行的方案。
The deterministic teleportation of optical modes over a 6.0-km fiber channel is realized with continuous variable entanglement. Quantum teleportation, which is the transfer of an unknown quantum state from one station to another over a certain distance with the help of nonlocal entanglement shared by a sender and a receiver, has been widely used as a fundamental element in quantum communication and quantum computation. Optical fibers are crucial information channels, but teleportation of continuous variable optical modes through fibers has not been realized so far. Here, we experimentally demonstrate deterministic quantum teleportation of an optical coherent state through fiber channels. Two sub-modes of an Einstein-Podolsky-Rosen entangled state are distributed to a sender and a receiver through a 3.0-km fiber, which acts as a quantum resource. The deterministic teleportation of optical modes over a fiber channel of 6.0 km is realized. A fidelity of 0.62 ± 0.03 is achieved for the retrieved quantum state, which breaks through the classical limit of 1/2. Our work provides a feasible scheme to implement deterministic quantum teleportation in communication networks.
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