反氢实验中里德伯铯原子的太赫兹诱导跃迁
Induced THz transitions in Rydberg caesium atoms for application in antihydrogen experiments
摘要：
反氢原子在欧洲核子研究中心以高激发里德堡态产生。然而，精确的测量需要反原子处于基态。尽管目前的实验仅依赖于自发发射，但模拟表明，THz光可用于刺激向基态的衰变，从而增加可用于测量的反原子的数量。我们审查不同的可能性在手产生光的太赫兹范围内所需的目的受激去激。我们展示了黑体型光源的效果，然而，这对于该应用存在缺点，包括强光电离。此外，我们报告的第一个太赫兹光混合器诱导的里德伯铯原子的光束中的跃迁，并得出结论与反氢的情况下的结果的影响。
英文摘要：
Antihydrogen atoms are produced at CERN in highly excited Rydberg states. However, precision measurements require anti-atoms in ground state. Whereas experiments currently rely on spontaneous emission only, simulations have shown that THz light can be used to stimulate the decay towards ground state and thus increase the number of anti-atoms available for measurements. We review different possibilities at hand to generate light in the THz range required for the purpose of stimulated deexcitation. We demonstrate the effect of a blackbody type light source, which however presents drawbacks for this application including strong photoionization. Further, we report on the first THz transitions in a beam of Rydberg caesium atoms induced by photomixers and conclude with the implications of the results for the antihydrogen case.
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