彭宁阱中单个/sup 25/Mg/sup +/离子的量子跃迁研究

Conference Digest. 2000 International Quantum Electronics Conference (Cat. No.00TH8504) Pub Date : 2000-09-10 DOI:10.1109/IQEC.2000.907969

H. Powell, W. Irvine, M. V. van Eijkelenborg, D. M. Segal, R. Thompson

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摘要

我们已经对彭宁阱中单个镁离子的量子跃迁进行了研究。该系统的不同寻常之处在于，仅使用单一激光频率就可以观察到量子跃迁，该频率用于激光冷却离子(为检测提供荧光)，将离子置于亚稳态(通过非谐振拉曼跃迁)，并将离子从亚稳态重新泵回冷却循环(再次通过拉曼跃迁)。单个/sup 24/Mg/sup +/离子以前已经在Penning阱中研究过了，但我们已经预测并观察到一些有趣的效应，这些效应只发生在/sup 25/Mg/sup +/中。我们还捕获了/sup 26/Mg/sup +/的单离子，并证实了它们的量子跃迁行为与预期的/sup 24/Mg/sup +/相似。/sup 25/Mg/sup +/的新特性是由于该离子中存在超精细结构。

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Studies of quantum jumps in a single /sup 25/Mg/sup +/ ion held in a Penning trap

We have performed a study of quantum jumps in single magnesium ions held in a Penning trap. This system is unusual in that quantum jumps may be observed using only a single laser frequency which serves to laser cool the ion (providing fluorescence for detection), shelve the ion in a metastable state (via an off-resonant Raman transition) and also to repump the ion from the metastable state back into the cooling cycle (again via a Raman transition). Single /sup 24/Mg/sup +/ ions have been studied in a Penning trap before but we have predicted and now observed a number of interesting effects that occur only in /sup 25/Mg/sup +/. We have also trapped single ions of /sup 26/Mg/sup +/ and confirmed that their quantum jump behaviour is similar to that of /sup 24/Mg/sup +/ as expected. The novel features in the behaviour of /sup 25/Mg/sup +/ are due to the presence of hyperfine structure in this ion.

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Conference Digest. 2000 International Quantum Electronics Conference (Cat. No.00TH8504)

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