Dynamical entanglement purification using chains of atoms and optical cavities
Dynamical entanglement purification using chains of atoms and optical cavities
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DOI：
10.1103/physreva.84.042303
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发表时间：
2011-10-04
影响因子：
2.9
通讯作者：
van Loock, Peter
中科院分区：
文献类型：
--
作者：
Gonta, Denis;van Loock, Peter
在腔QED的框架下，我们提出了一种利用耦合到高精细光腔的原子短链来动态净化两粒子纠缠态的实用方案。与传统的纠缠净化协议相比，我们避免了受控非门，从而减少了复杂的脉冲序列和多余的量子比特操作。我们的相互作用方案以确定性的方式工作，并与纠缠分布和交换一起，为长距离量子通信开辟了一条通往高效量子中继器的道路。
In the framework of cavity QED, we propose a practical scheme to purify dynamically a bipartite entangled state using short chains of atoms coupled to high-finesse optical cavities. In contrast to conventional entanglement purification protocols, we avoid controlled-NOT gates, thus reducing complicated pulse sequences and superfluous qubit operations. Our interaction scheme works in a deterministic way and, together with entanglement distribution and swapping, opens a route toward efficient quantum repeaters for long-distance quantum communication.