arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2101.05097quant-ph
收藏

远程多模固态量子存储器之间的纠缠

Telecom-heralded entanglement between remote multimode solid-state quantum memories

Dario Lago-Rivera, Samuele Grandi, Jelena V. Rakonjac, Alessandro Seri, Hugues de Riedmatten

摘要:

未来的量子网络将能够在遥远的位置之间分配纠缠,并允许在量子通信,量子传感和分布式量子计算中的应用。这个网络的核心是在远程互连的量子节点上产生和存储纠缠的能力。虽然各种性质的远程物理系统已经成功地纠缠在一起,但这些实现都没有涵盖网络操作的所有要求,例如电信兼容性和多模操作。在这里,我们报告了两个空间分离的量子节点之间的纠缠的演示,其中纠缠存储在多模固态量子存储器中。在每个节点处,掺杂镨的晶体存储相关对的光子,其中第二个光子处于电信波长。放置在不同实验室的量子存储器之间的纠缠通过以高达1.4 kHz的速率检测电信光子来预示,并存储在晶体中预定的存储时间高达25微秒。我们还表明,所产生的纠缠是强大的,对损失的先驱路径,并演示时间复用操作,62个时间模式。我们的实现可扩展到更长距离的纠缠,并为基于固态资源的现场部署的多路复用量子中继器提供了一条可行的路线。

英文摘要:

Future quantum networks will enable the distribution of entanglement between distant locations and allow applications in quantum communication, quantum sensing and distributed quantum computation. At the core of this network lies the ability of generating and storing entanglement at remote, interconnected quantum nodes. While remote physical systems of various nature have been successfully entangled, none of these realisations encompassed all of the requirements for network operation, such as telecom-compatibility and multimode operation. Here we report the demonstration of heralded entanglement between two spatially separated quantum nodes, where the entanglement is stored in multimode solid-state quantum memories. At each node a praseodymium-doped crystal stores a photon of a correlated pair, with the second photon at telecommunication wavelengths. Entanglement between quantum memories placed in different labs is heralded by the detection of a telecom photon at a rate up to 1.4 kHz and is stored in the crystals for a pre-determined storage time up to 25 microseconds. We also show that the generated entanglement is robust against loss in the heralding path, and demonstrate temporally multiplexed operation, with 62 temporal modes. Our realisation is extendable to entanglement over longer distances and provides a viable route towards field-deployed, multiplexed quantum repeaters based on solid-state resources.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑