量子网络
计算机科学
量子信息科学
光子
同步(交流)
量子位元
量子成像
量子信道
量子
电子工程
物理
电信
光学
量子信息
量子纠缠
工程类
量子力学
频道(广播)
作者
Raju Valivarthi,Lautaro Narváez,Samantha Davis,Nikolai Lauk,C. Peña,S. Xie,Jason P. Allmaras,Andrew D. Beyer,Boris Korzh,Andrew Mueller,M. Kiburg,Matthew D. Shaw,Emma E. Wollman,P. Spentzouris,Daniel Oblak,Neil Sinclair,M. Spiropulu
标识
DOI:10.1109/jlt.2022.3194860
摘要
The operation of long-distance quantum networks requires photons to be synchronized and must account for length variations of quantum channels. We demonstrate a 200 MHz clock-rate fiber optic-based telecommunication C-band quantum network using off-the-shelf components combined with custom-made electronics. The network is backed by a scalable and fully automated synchronization system with ps-scale timing resolution. Synchronization of the photons is achieved by distributing O-band-wavelength laser pulses between network nodes. Specifically, we distribute photon pairs between three nodes, and measure a reduction of coincidence-to-accidental ratio from 77 to only 42 when the synchronization system is enabled, which permits high-fidelity qubit transmission. Our demonstration sheds light on the role of noise in quantum communication and represents a key step in realizing deployed co-existing classical-quantum networks.
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