arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2211.04415quant-phphysics.atom-ph
收藏

热原子气体中单光子兼容的C带量子存储器

A Single-Photon-compatible Telecom-C-Band Quantum Memory in a Hot Atomic Gas

S. E. Thomas, S. Sagona-Stophel, Z. Schofield, I. A. Walmsley, P. M. Ledingham

摘要:

与电信C波段兼容的量子光学状态的有效存储和按需检索是未来基于地面的量子光学网络的要求。C波段的频谱最大限度地减少了光纤传播损耗,而宽的光带宽有利于高速网络协议。在这里,我们报告的电信波长和带宽兼容的量子存储器。在热的$^{87}$ Rb蒸气中使用非共振级联吸收协议,我们证明了$20.90(1)\,\%$的总存储效率与多普勒限制的存储时间为$1.10(2)\,$ ns。我们用弱相干态的记忆性能,证明信噪比大于单位以上的平均光子数输入$4.5(6)\times10^{-6}$每脉冲。

英文摘要:

The efficient storage and on-demand retrieval of quantum optical states that are compatible with the telecommunications C-band is a requirement for future terrestrial-based quantum optical networking. Spectrum in the C-band minimises optical fiber-propagation losses, and broad optical bandwidth facilitates high-speed networking protocols. Here we report on a telecommunication wavelength and bandwidth compatible quantum memory. Using the Off-Resonant Cascaded Absorption protocol in hot $^{87}$Rb vapour, we demonstrate a total memory efficiency of $20.90(1)\,\%$ with a Doppler-limited storage time of $1.10(2)\,$ns. We characterise the memory performance with weak coherent states, demonstrating signal-to-noise ratios greater than unity for mean photon number inputs above $4.5(6)\times10^{-6}$ per pulse.

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。

↑