Deterministic entanglement swapping with an ion-trap quantum computer
Deterministic entanglement swapping with an ion-trap quantum computer
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DOI：
10.1038/nphys1107
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发表时间：
2008-11
期刊：
影响因子：
19.6
通讯作者：
M. Riebe;T. Monz;Kyoung-Whan Kim;A. Villar;P. Schindler;M. Chwalla;M. Hennrich;R. Blatt
中科院分区：
文献类型：
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作者：
M. Riebe;T. Monz;Kyoung-Whan Kim;A. Villar;P. Schindler;M. Chwalla;M. Hennrich;R. Blatt
纠缠曾经只是量子力学基础上的一个争议话题，如今已经成为新兴的量子信息处理领域的一个重要问题，有着广泛的应用前景，包括保密通信、隐形传态和强大的量子计算。因此，当前量子信息领域实验工作的一个焦点是纠缠量子系统的产生和操纵。在这里，我们提出了我们的结果纠缠两个量子比特在离子阱量子处理器不是通过离子量子比特的直接相互作用，而是通过称为纠缠交换协议的行动。我们的离子阱系统使我们能够以完全确定性的方式实现纠缠交换协议的所有步骤。因此，两个离子量子比特可以在定义明确的纠缠态中按需制备。这个特殊的特性可以促进量子中继器的实现，或者有助于在离子阱量子计算机中分布纠缠态。
Entanglement—once only a subject of disputes about the foundation of quantum mechanics—has today become an essential issue in the emerging field of quantum information processing, promising a number of applications, including secure communication, teleportation and powerful quantum computation. Therefore, a focus of current experimental work in the field of quantum information is the creation and manipulation of entangled quantum systems. Here, we present our results on entangling two qubits in an ion-trap quantum processor not through a direct interaction of the ion qubits but instead through the action of a protocol known as entanglement swapping. Our ion-trap system enables us to implement all steps of the entanglement swapping protocol in a fully deterministic way. Thus, two ion qubits can be prepared on demand in a well-defined entangled state. This particular feature may facilitate the implementation of quantum repeaters or aid in distributing entangled states in ion-trap quantum computers.