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arXiv 1402.2624quant-ph
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耦合非马尔可夫原子-腔系统中的单光子存储

Single-Photon Storing in Coupled Non-Markovian Atom-Cavity System

H. Z. Shen, M. Qin, X. X. Yi

摘要:

在考虑非马尔可夫效应的情况下,我们研究了如何在耦合到光腔中的单个原子中存储任意时间形状的单光子。我们的模型适用于三能级原子的拉曼跃迁,其中一个分支的跃迁由驱动脉冲控制,另一个分支耦合到腔。对于任意的输入光场与光腔的耦合以及原子与驱动脉冲和腔的失谐,我们将输入输出关系从马尔可夫动力学推广到非马尔可夫动力学。对于大多数可能的光子形状,我们推导出一个解析表达式的驱动脉冲,以完全映射到原子的输入光子。我们发现,驱动脉冲的振幅仅取决于原子与腔频率的失谐量,即,原子对驱动脉冲的失谐对驱动脉冲的强度没有影响。

英文摘要:

Taking the non-Markovian effect into account, we study how to store a single photon of arbitrary temporal shape in a single atom coupled to an optical cavity. Our model applies to Raman transitions in three-level atoms with one branch of the transition controlled by a driving pulse, and the other coupled to the cavity. For any couplings of input field to the optical cavity and detunings of the atom from the driving pulse and cavity, we extend the input-output relation from Markovian dynamics to non-Markovian one. For most possible photon shapes, we derive an analytic expression for the driving pulse in order to completely map the input photon into the atom. We find that, the amplitude of the driving pulse depends only on the detuning of the atom from the frequency of the cavity, i.e., the detuning of the atom to the driving pulse has no effect on the strength of the driving pulse.

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