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arXiv 1105.1699quant-ph
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原子-腔耦合系统中的单光子吸收

Single-Photon Absorption in Coupled Atom-Cavity Systems

Jerome Dilley, Peter Nisbet-Jones, Bruce W. Shore, Axel Kuhn

摘要:

我们展示了如何用一个原子耦合到一个光学腔中来捕获一个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,其中一个分支由(经典)激光脉冲控制,另一个分支耦合到腔。撞击在腔上的光子通常表现出原子的部分反射、透射和/或吸收。只有合适的时间形状的控制脉冲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,我们推导出一个明确的解析表达式,这个控制脉冲的形状,我们讨论这是如何涉及到量子存储器。

英文摘要:

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.

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。

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