光腔中原子的定位

Atomic-position localization in optical cavity

研究了置于一个驻波光腔中的二能级原子的定位情况,发现通过利用测量场正交分量的方法可以很好地定位单个原子的位置。在腔中放入两个二能级原子,根据瑞利极限条件可知若置于腔中的两个原子距离太近,很难区分出这两个原子。但同样地利用测量场的正交分量方法后仍然可以很好地分辨出这两个距离很近的原子。然而若考虑腔场的损耗时,腔损耗将会损害两原子之间的相对定位。并且随着腔的衰减系数增大,两原子之间相对定位情况也越差。

The localization of a two-level atom placed in an optical cavity containing a standing wave is investigated, and the single atomic-position can be well-localized by the way of quadrature-field measurement. According to the Rayleigh limit when two two-level atoms are put in the cavity, it is difficult to distinguish between the two atoms if they are very close to each other. Also, the two atoms can be still well-distinguished by quadrature-field measurement. However, if the cavity damping is taken into account, the two-atom relative position localization will be damaged. The larger damping rate of the cavity become, the worse the two-atom relative position localization will be.