Effects of dipole-dipole interaction on the transmitted spectrum of two-level atoms trapped in an optical cavity
Effects of dipole-dipole interaction on the transmitted spectrum of two-level atoms trapped in an optical cavity
复制标题
偶极-偶极相互作用对光腔中两能级原子透射光谱的影响
DOI：
10.1103/physreva.89.043838
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发表时间：
2012-07
影响因子：
2.9
通讯作者：
Barker, Peter
中科院分区：
文献类型：
--
作者：
Zhang, Yu-Qing;Tan, Lei;Barker, Peter
在较低和较高激发态下，研究了单模光腔与偶极耦合双原子强耦合相互作用系统的透射谱。通过将两原子系统转化为有效的单原子系统，得到了含有偶极-偶极相互作用（DDI）的修饰态。我们发现，在低激发下，DDI能增强原子-腔正失谐量的影响，但在负失谐量的情况下，DDI会减弱原子-腔正失谐量的影响，导致谱线出现两个高度和位置发生偏移的非对称峰.对于高激发态，DDI增加了原子的饱和度，导致光谱变形。此外，大的DDI可以导致原子和腔解耦，产生简正模谱的单线态。
The transmission spectrum of two dipole-coupled atoms interacting with a single-mode optical cavity in the strong coupling regime is investigated theoretically for the lower and higher excitation cases. The dressed states containing the dipole-dipole interaction (DDI) are obtained by transforming the two-atom system into an effective single-atom system. We find that the DDI can enhance the effects resulting from the positive atom-cavity detunings but weakens them for the negative detuning cases for the lower excitation, which causes the spectrum to exhibit two asymmetric peaks with shifted heights and positions. For the higher excitation cases, the DDI augments the atomic saturation and leads to the deforming of the spectrum. Furthermore, the large DDI can cause the atom and the cavity to decouple, producing a singlet of the normal-mode spectrum.