The effect of a permanent dipole moment on the polar molecule cavity quantum electrodynamics
The effect of a permanent dipole moment on the polar molecule cavity quantum electrodynamics
复制标题
永久偶极矩对极性分子腔量子电动力学的影响
DOI：
10.1088/1674-1056/25/4/044202
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发表时间：
2016
影响因子：
1.7
通讯作者：
Wang Zhong-Yang
中科院分区：
文献类型：
--
作者：
Zhao Jing-Yun;Qin Li-Guo;Cai Xun-Ming;Lin Qiang;Wang Zhong-Yang
提出了一种超越旋波近似的缀饰态微扰理论，研究了极性分子的二能级电子跃迁与量子化腔场的相互作用。解析表达式可以明确地推导出的基态和激发态的能量谱和波函数的系统，其中的贡献的永久偶极矩（PDM）和反向旋转波项（CRT）可以分别显示。这些显式结果的有效性进行了讨论，通过与直接数值模拟的比较。与CRT耦合相比，PDM导致了更多的修饰态耦合，能量位移与归一化永久偶极差的平方成正比，并且在巨偶极分子腔QED中可以产生更大的Bloch-Siegert位移.此外，我们的方法还可以推广到求解RWA以外的二能级原子Rabi模型哈密顿量。
A dressed-state perturbation theory beyond the rotating wave approximation (RWA) is presented to investigate the interaction between a two-level electronic transition of polar molecules and a quantized cavity field. Analytical expressions can be explicitly derived for both the ground- and excited-state-energy spectrums and wave functions of the system, where the contribution of permanent dipole moments (PDM) and the counter-rotating wave term (CRT) can be shown separately. The validity of these explicit results is discussed by comparison with the direct numerical simulation. Compared to the CRT coupling, PDM results in the coupling of more dressed states and the energy shift is proportional to the square of the normalized permanent dipole difference, and a greater Bloch–Siegert shift can be produced in the giant dipole molecule cavity QED. In addition, our method can also be extended to the solution of the two-level atom Rabi model Hamiltonian beyond the RWA.