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arXiv quant-ph/0312181quant-ph
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单原子激光诱导的原子自陷

Single-atom lasing induced atomic self trapping

Thomas Salzburger, Helmut Ritsch

摘要:

研究了单原子激光器中的运动和场动力学,该激光器由单个非相干泵浦的自由原子组成,原子在光学高{ \it Q}腔中运动。为了获得足够的泵浦,只要原子接近场的波腹,系统就开始发射激光。如果场模本征频率大于原子跃迁频率,则产生的激光将原子吸引到场的波腹并冷却其运动。利用量子MonteCarlo波函数模拟,我们研究了这种耦合的原子-场动力学,包括光子反冲和腔衰减。在强耦合状态下,产生的场表现出强的非经典特征,如光子反聚束,原子在空间上受到限制并冷却到亚多普勒温度。

英文摘要:

We study motion and field dynamics of a single-atom laser consisting of a single incoherently pumped free atom moving in an optical high-{\it Q} resonator. For sufficient pumping, the system starts lasing whenever the atom is close to a field antinode. If the field mode eigenfrequency is larger than the atomic transition frequency, the generated laser light attracts the atom to the field antinode and cools its motion. Using quantum Monte Carlo wave function simulations, we investigate this coupled atom-field dynamics including photon recoil and cavity decay. In the regime of strong coupling, the generated field shows strong nonclassical features like photon antibunching, and the atom is spatially confined and cooled to sub-Doppler temperatures.

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