文献类型：期刊文献

英文题名：Effective creation of ultracold deeply-bound molecules via non-Hermitian stimulated Raman shortcut-to-adiabatic passage

作者：Zhang, Jiahui[1];Naim, Nida[1];Deng, Li[1];Niu, Yueping[1,2,3];Gong, Shangqing[1,2,3]

机构：[1]East China Univ Sci & Technol, Sch Phys, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Shanghai Frontiers Sci Ctr Optogenet Tech Cell Met, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Shanghai 200237, Peoples R China

年份：2023

卷号：48

外文期刊名：RESULTS IN PHYSICS

收录：;EI(收录号：20230049504);WOS:【SCI-EXPANDED(收录号:WOS:000972029600001)】；

基金：Acknowledgments This work was supported by the National Natural Science Founda-tion of China (Grant Nos. 11974109, 12034007) and the Program of Shanghai Academic Research Leader, China (Grant No. 21XD1400700) .

语种：英文

外文关键词：Deeply bound ultracold molecules; Non-Hermitian stimulated Raman; shortcut-to-adiabatic passage; Adiabatic elimination; Stimulated Raman adiabatic passage

摘要：In this paper, we carry out the non-Hermitian stimulated Raman shortcut-to-adiabatic passage (NH-STIRSAP) to create ultracold deeply-bound molecules. The open three-level molecular system is supposed to have irreversible decays out of all levels. Under the assumption of large single-photon detuning and/or strong loss rate of the excited level, the NH three-level system can be theoretically reduced to an effective two-level system. By continuously using the counter-diabatic driving of the shortcut-to-adiabaticity, an auxiliary field is produced to couple the Feshbach level with the ground level. In the numerical calculations, we firstly consider the case of decaying only from the excited level, which is the main loss of the system. Under the NH-STIRSAP, the calculations reveal that complete population transfer from the Feshbach to the ground level can occur even if the adiabatic condition is not fulfilled. Therefore, the creation efficiency of ultracold deeply-bound molecules is greatly improved. The results hold equally for counter-intuitive and intuitive time sequence of the Stokes and pump pulse. If the decays from the Feshbach and ground level are also included, the NH-STIRSAP can still restore most of that efficiency, which performs much better than typical stimulated Raman adiabatic passage. Finally, we point out that the robustness and fast transfer speed of the NH-STIRSAP facilitate the creation and detection of ultracold deeply-bound molecules.