论文标题
室温原子频率梳子记忆
Room Temperature Atomic Frequency Comb Memory for Light
论文作者
论文摘要
我们使用室温碱蒸气中的原子频率梳子量子记忆协议证明了脉冲光的连贯存储和检索。我们利用速度选择性的光学泵送来准备$ f = 4 $超精细纤维基木的多个速度类。选择类的频率间距与$ f'= 4 -f'= 5 $超精细分裂的$ 6^2 $ p $ _ {3/2} $兴奋状态相吻合，从而导致宽带周期性的吸收结构，由两个通常多普勒 - 副本的光学过渡组成。弱相干状态$ 2 \，\ mathrm {ns} $被映射到此原子频率梳中，预编程的召回时间为$ 8 \，\ mathrm {ns} $和$ 12 \，\ \ mthrm {ns} $，并带有多型在储存模式和回忆。在梳子中利用两个过渡会导致对重新调整的额外干扰效应，从而提高了召回效率。
We demonstrate coherent storage and retrieval of pulsed light using the atomic frequency comb quantum memory protocol in a room temperature alkali vapour. We utilise velocity-selective optical pumping to prepare multiple velocity classes in the $F=4$ hyperfine ground state of caesium. The frequency spacing of the classes is chosen to coincide with the $F'=4 - F'=5$ hyperfine splitting of the $6^2$P$_{3/2}$ excited state resulting in a broadband periodic absorbing structure consisting of two usually Doppler-broadened optical transitions. Weak coherent states of duration $2\,\mathrm{ns}$ are mapped into this atomic frequency comb with pre-programmed recall times of $8\,\mathrm{ns}$ and $12\,\mathrm{ns}$, with multi-temporal mode storage and recall demonstrated. Utilising two transitions in the comb leads to an additional interference effect upon rephasing that enhances the recall efficiency.
