文献类型：期刊文献

英文题名：Detuning-induced stimulated Raman adiabatic passage in two-level systems with permanent dipole moments

作者：Deng, Li[1];Niu, Yueping[1];Gong, Shangqing[1]

机构：[1]East China Univ Sci & Technol, Dept Phis, Shanghai 200237, Peoples R China

年份：2018

卷号：98

期号：6

外文期刊名：PHYSICAL REVIEW A

收录：;EI(收录号：20190106336688);WOS:【SCI-EXPANDED(收录号:WOS:000454151500007)】；

基金：This work was supported by the National Natural Science Foundation of China (Grants No. 11504108, No. 11774089, and No. 11474092), and supported by Scientific Research Foundation for Returned Scholars, Ministry of Education of China.

语种：英文

外文关键词：Microchannels - Optical pumping - Photons

摘要：The detuning-induced stimulated Raman adiabatic passage (D-STIRAP) in two-level systems with permanent dipole moments (PDMs) is investigated. Based on a transformed Schrodinger equation, we discuss the coherence generation under the one- and two-photon excitations, respectively. In the one-photon excitation, our analysis shows that the envelope of the pump pulse gets modulated in presence of the PDMs. The modulation becomes stronger while the difference between the PDMs of the two levels becomes larger. Gradually, the adiabatic process of the D-STIRAP fails to complete and the robustness of the technique disappears. Therefore, parameters have to be chosen with care if maximum coherence is desired in systems with large or giant difference between the PDMs Similar results can also be found in the two-photon excitation, although the influence of the PDMs on the D-STIRAP seems weaker compared with that in the one-photon excitation case. Finally, we point out that the negative role of the PDMs can be effectively avoided by simply choosing longer pulses instead and the D-STIRAP can be safely applied in two-level systems with PDMs.