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首页> 外文会议>International conference on laser physics 2010 >Creation and measurement of coherent superposition states in multilevel atoms
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Creation and measurement of coherent superposition states in multilevel atoms

机译：多能级原子中相干叠加态的创建和测量

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摘要

We propose and analyze a scheme for creation of coherent superposition of meta-stable states in a multilevel atom. The scheme is based on interaction of a frequency modulated (chirped) laser pulse and a pulse of a constant carrier frequency with the atom having two meta-stable (ground) states and multiple excited states. The negligible excitation of the atoms is a priority in the proposed scheme to eliminate the de-coherence processes caused by the decay of the excited states. The scheme is applied to create coherent superposition of magnetic sublevels of ground states of the 87Rb atom taking into account all allowed electric-dipole transitions between magnetic sublevels of the 5 2S1/2 - 52P3/2 transition (D2 line). In addition to the theoretical analysis we consider possible experimental realizations of the proposed coherence creation scheme and discuss their feasibilities and constraints. We concentrate on a detection of the superposition state in the Faraday-rotation experiment. Such detection reduces technical laser noise background and offers high sensitivity of the coherence detection. Moreover, it allows extra control of the atomic sample and the interaction dynamics by external magnetic field.
机译：我们提出并分析了一种在多级原子中创建亚稳态相干叠加的方案。该方案基于调频（chi）激光脉冲和恒定载频脉冲与具有两个亚稳态（基态）和多个激发态的原子的相互作用。在所提出的方案中，原子的可忽略的激发是优先考虑的，以消除由激发态的衰减引起的去相干过程。考虑到5 2S1 / 2-52P3 / 2跃迁的磁性子能级之间的所有允许电偶极跃迁（D2线），该方案适用于创建87Rb原子基态的磁性子能级的相干叠加。除了理论分析之外，我们还考虑了所提出的一致性创建方案的可能的实验实现，并讨论了它们的可行性和局限性。我们专注于法拉第旋转实验中叠加状态的检测。这种检测减少了技术激光噪声背景，并提供了高的相干检测灵敏度。而且，它允许通过外部磁场对原子样本和相互作用动力学进行额外控制。

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