这些铷原子可以产生一种称为“电磁感应光透明”(EIT)的效应，可以帮助科学家从主波包中分离出单个光子前驱。

The atoms had an effect called electromagnetically induced transparency (EIT), which enabled the scientists to separate the single-photon precursors from the main wave packet.

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来自CNRS(法国科学研究中心)光子与纳米结构实验室的团队研究出比现有纠缠光子源亮20倍的新型超亮源。

A team from the Laboratoire DE Photonique et DE Nano-structures (LPN) of CNRS has developed a light source of entangled photons twenty times brighter than all existing systems.

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本文推导两个成份的光学猫态的平均光于数，二阶相干度的表达式及猫态的光子数分布，揭示出猫态的某些性质。

The mean photon number, the second-order coherence and the distribution of this optical cat state are derived in this paper and some properties of this state are presented.

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So that means we're going to need to figure out what is the energy per photon that's emitted by that UV light.

所以那意味着我们将需要,计算出从紫外光源发射出的,每个光子的能量。

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So this means that we can go directly from the energy between two levels to the frequency of the photon that's emitted when you go between those levels.

这意味着我们可以直接,从两个能级的能量得到它们之间,跃迁发射出光子的频率。

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So we can figure out the energy of each photon emitted by our UV lamp by saying e is equal to h c over wavelength.

所以我们可以计算出,每个从紫外光源射出的光子,也就是e等于h乘以c除以波长。

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