arXiv 1210.22012012-10-08quant-ph

量子网络中的量子隐形传态

Quantum Teleportation within a Quantum Network

Hari Prakash, Ajay K Maurya, Manoj K Mishra

备注：: 14 pages, 3 Figures

摘要：

我们考虑在量子网络中由发送者，比如说，Alice将未知信息状态传送到多个接收者中的任意给定接收者，比如说，Bob（1），Bob（2），.鲍勃。为此，我们提出了两个方案，利用（n +1）分GHZ态作为量子信道。第一种方案涉及对Bobs的量子位进行C-NOT操作，控制作为Alice的量子位，而第二种方案涉及Bobs在其量子位上的Hadamard基测量。我们将这两种方案推广到量子网络中任意m比特信息态的量子隐形传态。在此基础上，我们提出了利用高失谐量的Λ型三能级原子与光场相互作用制备（n +1）粒子GHZ态的两种实验方案。我们还讨论了可能的实验缺陷，如，原子辐射时间，腔阻尼时间和原子-腔相互作用时间。

英文摘要：

We consider the problem of teleporting an unknown information state within a quantum network by a sender, say, Alice to any given receiver out of several receivers, say, Bob(1), Bob(2), ...., Bob(n). For this task, we suggest two schemes using (n+1)-partite GHZ state as a quantum channel. The first scheme involves C-NOT operations on qubit of Bobs with the control as qubit of Alice, while the second scheme involves measurements in the Hadamard basis by Bobs on their qubits. We have generalized both schemes for quantum teleportation of arbitrary m-qubit information state within the quantum network. Further, we have proposed two experimental schemes for the generation of (n+1)-partite GHZ state using interaction between highly detuned Λ-type three-level atoms and optical coherent field. We also discuss the possible experimental imperfections like, atomic-radiative time, cavity damping time and atom-cavity interaction time.

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