Single-photon absorption in coupled atom-cavity systems
Single-photon absorption in coupled atom-cavity systems
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DOI：
10.1103/physreva.85.023834
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发表时间：
2012-02-24
影响因子：
2.9
通讯作者：
Kuhn, Axel
中科院分区：
文献类型：
--
作者：
Dilley, Jerome;Nisbet-Jones, Peter;Kuhn, Axel
我们展示了如何用耦合到光学腔的一个原子捕获任意时间形状的单个光子。我们的模型适用于三能级原子中的拉曼跃迁，跃迁的一个分支由（经典）激光脉冲控制，另一个分支耦合到腔。撞击到腔上的光子通常表现出原子的部分反射、透射和/或吸收。只有具有合适时间形状的控制脉冲才能确保整个脉冲的阻抗匹配，这对于从光子到原子的完整状态映射是必要的。对于大多数可能的光子形状，我们得出了该控制脉冲形状的明确解析表达式，并讨论了它与量子存储器的关系。
We show how to capture a single photon of arbitrary temporal shape with one 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 (classical) laser pulse, and the other coupled to the cavity. Photons impinging on the cavity normally exhibit partial reflection, transmission, and/or absorption by the atom. Only a control pulse of suitable temporal shape ensures impedance matching throughout the pulse, which is necessary for complete state mapping from photon to atom. For most possible photon shapes, we derive an unambiguous analytic expression for the shape of this control pulse, and we discuss how this relates to a quantum memory.