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arXiv 0811.3780physics.atom-ph
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超冷原子的晶格干涉仪

Lattice Interferometer for Ultra-Cold Atoms

Mikkel F. Andersen, Tycho Sleator

摘要:

我们演示了一个基于超冷原子从光晶格中释放的原子干涉仪。这种技术产生了一个很大的改善,在信号噪声比以前演示的相关干涉仪。干涉仪涉及使用脉冲光晶格的原子衍射。对于短脉冲,一个简单的分析理论预测了预期的信号。我们研究了短脉冲和长脉冲的干涉仪,分析理论被打破。更长的脉冲可以提高精度和信号大小。对于特定的脉冲长度,我们观察到一个相干信号的时间,大大不同于预期的短脉冲模型。干涉信号还揭示了晶格中原子的动力学信息。我们调查的应用程序的干涉仪的测量$h/m_A$,连同其他众所周知的常数构成了测量的精细结构常数。

英文摘要:

We demonstrate an atomic interferometer based on ultra-cold atoms released from an optical lattice. This technique yields a large improvement in signal to noise over a related interferometer previously demonstrated. The interferometer involves diffraction of the atoms using a pulsed optical lattice. For short pulses a simple analytical theory predicts the expected signal. We investigate the interferometer for both short pulses and longer pulses where the analytical theory break down. Longer pulses can improve the precision and signal size. For specific pulse lengths we observe a coherent signal at times that differs greatly from what is expected from the short pulse model. The interferometric signal also reveals information about the dynamics of the atoms in the lattice. We investigate the application of the interferometer for a measurement of $h/m_A$ that together with other well known constants constitutes a measurement of the fine structure constant.

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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