The effect of a permanent dipole moment on the polar molecule cavity quantum electrodynamics

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-st...

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Published inChinese physics B Vol. 25; no. 4; pp. 127 - 136
Main Author 赵晶云 秦立国 蔡勋明 林强 王中阳
Format Journal Article
LanguageEnglish
Published 01.04.2016
Subjects
Approximation
Coupling
Dipole moment
Dipoles
Holes
Mathematical analysis
Mathematical models
Product data management
偶极矩
极性分子
永久
激发态能谱
直接数值模拟
腔量子电动力学
解析表达式
量子电动力学效应
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ISSN1674-1056
2058-3834
1741-4199
DOI10.1088/1674-1056/25/4/044202

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Summary: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.
Bibliography:dressed-state perturbation theory, permanent dipole moment, counter-rotating wave term, Bloch-Siegert shift
11-5639/O4
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.
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ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/25/4/044202