arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2201.03692quant-phphysics.optics
收藏

电信波长光子量子比特的按需存储

On-demand storage of photonic qubits at telecom wavelengths

Duan-Cheng Liu, Pei-Yun Li, Tian-Xiang Zhu, Liang Zheng, Jian-Yin Huang, Zong-Quan Zhou, Chuan-Feng Li, Guang-Can Guo

摘要:

电信波长的量子存储器对于基于现有光纤网络构建大规模量子网络至关重要。电信光子量子比特的按需存储是这种网络应用的基本要求,但尚未得到证明。在这里,我们展示了电信光子量子比特的存储和按需检索使用的激光写入波导制作在$^{167}$ Er $^{3+}$:Y $_2$ SiO $_5$晶体。波导存储器的两端直接与光纤阵列连接,光纤到光纤的效率为51%。用单光子相干脉冲编码的时间仓量子比特可以获得98.3(1)%的存储保真度,这远远超过了经典的测量和准备策略所能达到的最大保真度。该器件具有高可靠性、易扩展性,可直接集成到光纤网络中,在基于光纤的量子网络中发挥重要作用。

英文摘要:

Quantum memories at telecom wavelengths are crucial for the construction of large-scale quantum networks based on existing fiber networks. On-demand storage of telecom photonic qubits is a fundamental request for such networking applications but yet to be demonstrated. Here we demonstrate the storage and on-demand retrieval of telecom photonic qubits using a laser-written waveguide fabricated in an $^{167}$Er$^{3+}$:Y$_2$SiO$_5$ crystal. Both ends of the waveguide memory are directly connected with fiber arrays with a fiber-to-fiber efficiency of 51%. Storage fidelity of 98.3(1)% can be obtained for time-bin qubits encoded with single-photon-level coherent pulses, which is far beyond the maximal fidelity that can be achieved with a classical measure and prepare strategy. This device features high reliability, easy scalability and can be directly integrated into fiber networks, which could play an essential role in fiber-based quantum networks.

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。

↑