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arXiv quant-ph/9811035quant-ph
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电磁腔中的双原子暗态

Two-atom dark states in electromagnetic cavities

G. J. Yang, O. Zobay, P. Meystre

摘要:

研究了两个二能级原子与电磁谐振腔中单个阻尼模耦合时的质心运动。对于单原子初始激发和腔模处于真空态的情况,表明暗态的出现主导了原子的时间演化。在这些状态中,初始激发存储在内部原子自由度中,原子变得量子力学纠缠,几乎不受腔中光子损失的影响。在原子光学的Raman-Nath近似下和非Raman-Nath近似下,计算了暗态的各种性质。

英文摘要:

The center-of-mass motion of two two-level atoms coupled to a single damped mode of an electromagnetic resonator is investigated. For the case of one atom being initially excited and the cavity mode in the vacuum state it is shown that the atomic time evolution is dominated by the appearance of dark states. These states, in which the initial excitation is stored in the internal atomic degrees of freedom and the atoms become quantum mechanically entangled, are almost immune against photon loss from the cavity. Various properties of the dark states within and beyond the Raman-Nath approximation of atom optics are worked out.

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