Quantum suppression of microwave ionization of Rydberg atoms at high scaled frequency.
Quantum suppression of microwave ionization of Rydberg atoms at high scaled frequency.
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DOI：
10.1103/physrevlett.93.193002
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发表时间：
2004-11
影响因子：
8.6
通讯作者：
H. Maeda;T. Gallagher
中科院分区：
文献类型：
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作者：
H. Maeda;T. Gallagher
当微波频率ω小于开普勒频率1/n时，里德伯原子的微波电离被很好地描述为经典混沌的开始（3）。然而，当ω>1/n（3）时，即，在高标度频率Ω = Ω（3）>1时，经典电离被预测为被量子干涉抑制，这类似于固体中的安德森定域。在17.55GHz微波场中，我们观察到了Sr里德伯原子在1</= Ω </=5范围内的电离。我们的测量表明，经典的扩散电离的量子抑制，并显示在这个制度的电离场是n独立的。
Microwave ionization of Rydberg atoms is well described as the onset of classical chaos when the microwave frequency omega is less than the Kepler frequency 1/n(3). However, when omega>1/n(3), i.e., at high scaled frequency Omega=omegan(3)>1, classical ionization is predicted to be suppressed by quantum interference, an analogue to Anderson localization in a solid. Using 17.55 GHz microwave fields we have observed the ionization of Sr Rydberg atoms in the regime 1</=Omega</=5 . Our measurements demonstrate the quantum suppression of classical diffusive ionization and show the ionization field to be n independent in this regime.