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arXiv quant-ph/0301166quant-ph
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电磁波对阻尼二能级原子的动力学效应

Dynamic effects of electromagnetic wave on a damped two-level atom

Z. Y. Zeng, G. J. Zeng, L. M. Kuang, L. D. Zhang

摘要:

研究了圆极化电磁波作用于二能级阻尼原子的动力学效应。结果表明阻尼原子能级的交流Stark分裂是有趣的.分裂能级具有不同的能量和寿命,它们都依赖于相互作用和原子的阻尼率。当电磁波的频率被调谐到满足强耦合极限下的共振条件时,跃迁几率呈现拉比振荡。原子与电磁波之间的动量传递具有与共振条件下跃迁几率相似的性质。当阻尼原子与电磁场相互作用时,不再存在稳定态。更重要的是,如果将电磁波的角频率调谐到与原子跃迁频率相同,并根据阻尼系数适当调整其振幅,就可以使原子与电磁场耦合系统处于一种特殊的“缀饰态”,并使系统在这种“缀饰态”中保持很长时间的相干性。这为制备相干原子态开辟了另一条途径。

英文摘要:

We studied the dynamic effects of an electromagnetic(EM) wave with circular polarization on a two-level damped atom. The results demonstrate interesting ac Stark split of energy levels of damped atom. The split levels have different energies and lifetimes, both of which depend on the interaction and the damping rate of atom. When the frequency of the EM wave is tuned to satisfy the resonance condition in the strong coupling limit, the transition probability exhibits Rabi oscillation. Momentum transfer between atom and EM wave shows similar properties as the transition probability under resonance condition. For a damped atom interacting with EM field, there exists no longer stable state. More importantly, if the angular frequency of the EM wave is tuned the same as the atomic transition frequency and its amplitude is adjusted appropriately according to the damping coefficients, we can prepare a particular 'Dressed State' of the coupled system between atom and EM field and can keep the system coherently in this 'Dressed state' for a very long time. This opens another way to prepare coherent atomic states.

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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