论文标题
快速，无噪声原子光学记忆，端到端效率为35％
Fast, noise-free atomic optical memory with 35% end-to-end efficiency
论文作者
论文摘要
连贯的光学记忆可能会在未来的量子通信网络中发挥重要作用。在不同的平台中，基于原子气体中梯子型轨道过渡的记忆可提供高带宽（$> 100 $ MHz），连续（按需）读数和低噪声操作。在这里，我们报告了以前报告的快速梯子内存的升级设置，并提高了效率和寿命以及噪声降低。升级采用更强的控制场，更宽的信号梁，降低的原子密度，更高的光学深度，环形光泵束和辅助轨道的弱敷料，以抵消残留的多普勒膜。对于2 ns长的脉冲，我们展示了53％的内部效率，35％的端到端效率，$ 3 \ times 10^{ - 5} $噪声光子每脉冲以及$ 1/e $ $ $ $ lifetime of 108 ns。表演的结合是连续阅读记忆的记录。
Coherent optical memories will likely play an important role in future quantum communication networks. Among the different platforms, memories based on ladder-type orbital transitions in atomic gasses offer high bandwidth ($>100$ MHz), continuous (on-demand) readout, and low-noise operation. Here we report on an upgraded setup of our previously-reported fast ladder memory, with improved efficiency and lifetime, and reduced noise. The upgrade employs a stronger control field, wider signal beam, reduced atomic density, higher optical depth, annular optical-pumping beam, and weak dressing of an auxiliary orbital to counteract residual Doppler-broadening. For a 2 ns-long pulse, we demonstrate 53% internal efficiency, 35% end-to-end efficiency, $3\times 10^{-5}$ noise photons per pulse, and a $1/e$ lifetime of 108 ns. This combination of performances is a record for continuous-readout memories.
