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arXiv quant-ph/0206049quant-ph
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具有光子数分辨率的原子蒸气基高效光学探测器

Atomic vapor-based high efficiency optical detectors with photon number resolution

Daniel James, Paul Kwiat

摘要:

我们提出了一种新的方法来检测弱光场的重要的基本问题,在几个光子的水平。以高效率(>99%)检测并区分给定时间间隔内光子数量的能力是一个非常具有挑战性的技术问题,在量子通信和信息处理中具有巨大的潜在回报。我们的建议不同于标准的固态光电探测器技术,采用原子蒸气作为活性介质,使用激光辐射在特定的量子态制备。光子的吸收将由修整激光辅助,并且将使用离子阱完善的“循环跃迁”方法来检测激发原子的存在或不存在。通过首先结合适当的上转换方案,我们的方法可以应用于各种各样的光波长。

英文摘要:

We propose a novel approach to the important fundamental problem of detecting weak optical fields at the few photon level. The ability to detect with high efficiency (>99%), and to distinguish the number of photons in a given time interval is a very challenging technical problem with enormous potential pay-offs in quantum communications and information processing. Our proposal diverges from standard solid-state photo-detector technology by employing an atomic vapor as the active medium, prepared in a specific quantum state using laser radiation. The absorption of a photon will be aided by a dressing laser, and the presence or absence of an excited atom will be detected using the ``cycling transition'' approach perfected for ion traps. By first incorporating an appropriate upconversion scheme, our method can be applied to a wide variety of optical wavelengths.

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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