Multi-Hop Teleportation of an Unknown Qubit State Based on W States |
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| Authors: | Xiang-Zhen Zhou Xu-Tao Yu Zai-Chen Zhang |
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| Institution: | 1.State Key Lab of Millimeter Waves,Southeast University,Nanjing,China;2.National Mobile Communications Research Laboratory,Southeast University,Nanjing,China |
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| Abstract: | Quantum teleportation is important in quantum communication networks. Considering that quantum state information is also transmitted between two distant nodes, intermediated nodes are employed and two multi-hop teleportation protocols based on W state are proposed. One is hop-by-hop teleportation protocol and the other is the improved multi-hop teleportation protocol with centralized unitary transformation. In hop-by-hop protocol, the transmitted quantum state needs to be recovered at every node on the route. In improved multi-hop teleportation protocol with centralized unitary transformation, intermediate nodes need not to recover the transmitted quantum state. Compared to the hop-by-hop protocol, the improved protocol can reduce the transmission delay and improve the transmission efficiency. |
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