论文标题

网络准备就绪的随机访问Qubits内存

A network-ready random-access qubits memory

论文作者

Langenfeld, S., Morin, O., Körber, M., Rempe, G.

论文摘要

光子量子位记忆是众多量子网络协议的重要成分。理想情况具有量子计算节点,这些节点通过量子接口有效地连接到量子通信通道。节点包含一组长寿命量子位,通道支持光量子的传播以及接口夫妇的光和物质量子。对于这个愿景,我们在这里展示了使用两个rubidium Atoms耦合到光腔相同模式的光子的随机多Qubit多Qubit编写记忆,该设置已知,该设置具有量子计算功能。我们用十多个独立的光子量子尺测试记忆,观察到没有明显的串扰,即使在十次写入尝试之后,也不需要重新定位。组合的写入效率为26%,连贯性时间接近1MS。借助这些功能,该节点构成了量子中继器的有前途的构建块,最终是量子互联网。

Photonic qubits memories are essential ingredients of numerous quantum networking protocols. The ideal situation features quantum computing nodes that are efficiently connected to quantum communication channels via quantum interfaces. The nodes contain a set of long-lived matter qubits, the channels support the propagation of light qubits, and the interface couples light and matter qubits. Towards this vision, we here demonstrate a random-access multi-qubit write-read memory for photons using two rubidium atoms coupled to the same mode of an optical cavity, a setup which is known to feature quantum computing capabilities. We test the memory with more than ten independent photonic qubits, observe no noticeable cross talk, and find no need for re-initialization even after ten write-read attempts. The combined write-read efficiency is 26% and the coherence time approaches 1ms. With these features, the node constitutes a promising building block for a quantum repeater and ultimately a quantum internet.

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