Stephan Kucera, Christian Haen, Elena Arenskötter, Tobias Bauer, Jonas Meiers, Marlon Schäfer, Ross Boland, Milad Yahyapour, Maurice Lessing, Ronald Holzwarth, Christoph Becher, Jürgen Eschner
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引用次数: 0
Abstract
We report on the implementation of quantum entanglement distribution and quantum state teleportation over a 14.4 km urban dark-fiber link, which is partially underground, partially overhead, and patched in several stations. We characterize the link for its use as a quantum channel and realize its active polarization stabilization. Using a type-II cavity-enhanced SPDC photon pair source, a 40Ca+ single-ion quantum memory, and quantum frequency conversion to the telecom C-band, we demonstrate photon-photon entanglement, ion-photon entanglement, and teleportation of a qubit state from the ion onto a remote telecom photon, all realized over the urban fiber link.
我们报告了在一条 14.4 千米长的城市暗光纤链路上实现量子纠缠分发和量子态远距传输的情况。我们分析了该链路作为量子信道使用的特性，并实现了其主动极化稳定。通过使用 II 型空腔增强 SPDC 光子对源、40Ca+ 单离子量子存储器和电信 C 波段量子频率转换，我们演示了光子-光子纠缠、离子-光子纠缠以及从离子到远程电信光子的量子比特态远距离传输，所有这些都是通过城市光纤链路实现的。
期刊介绍：
The scope of npj Quantum Information spans across all relevant disciplines, fields, approaches and levels and so considers outstanding work ranging from fundamental research to applications and technologies.
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