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中文摘要：
提出利用两个Einstein-Podolsky—RoSen（EPR）态作为量子信道隐形传送任意三原子W态的方案，并将该方案推广至隐形传送任意N（N≥4）原子W态．研究了实施方案的两种方法，给出了完成隐形传态的一种新思路：解纠缠-隐形传送-重构纠缠．讨论了量子信道受噪声影响时隐形传态的保真度．结果表明，当作为量子信道的两个最大纠缠态受到噪声影响时，隐形传态的保真度不仅与量子信道的纠缠度有关，还与待传送态中某一子系统的共生纠缠度有关．所提出的方案具有操作简便，节省量子信道纠缠资源的特点．
英文摘要：
A scheme for teleporting a three-atom entangled Wstate is proposed, in which the quantum channels are composed of two Einstein-Podolsky-Rosen （EPR） pairs, and that can be popularized to teleport an arbi- trary N-atom（N≥4） Wstate. Two ways of carrying out the proposal are investigated, and a new thought of teleportation, disentangle-teleport-reconstruct entanglement, is given. The fidelity of teleportation, when the quantum channels are affected by noise, is studied. The result reveals that the fidelity of teleportation is not only related to the entanglement of channel but also to the concurrence of reduced density matrix of certain subsystem of delivered state, when the quantum channels with two maximal entanglement pairs are affected by noise. Besides, compared with previous schemes, this scheme has advantages, such as easily operating and saving entanglement resources of quantum channels.
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