Fast and robust production of quantum superposition states by the fractional shortcut to adiabaticity  

作　　者：Guan-Qiang Li Hao Guo Yu-Qi Zhang Bo Yang Ping Peng 

机构地区：[1]Department of Physics and Institute of Theoretical Physics,Shaanxi University of Science and Technology,Xi'an 710021,China

出　　处：《Communications in Theoretical Physics》2025年第1期54-64,共11页理论物理通讯(英文版)

基　　金：supported by the NSF of China(Grant No.11405100);the Natural Science Basic Research Program in Shaanxi Province of China(Grant Nos.2020JM-507 and 2019JM-332)。

摘　　要：The fractional shortcut to adiabaticity(f-STA)for the production of quantum superposition states is proposed firstly via a three-level system with aΛ-type linkage pattern and a four-level system with a tripod structure.The fast and robust production of the coherent superposition states is studied by comparing the populations for the f-STA and the fractional stimulated Raman adiabatic passage(f-STIRAP).The states with equal proportions can be produced by fixing the controllable parameters of the driving pulses at the final moment of the whole process.The effects of the pulse intensity and the time delay of the pulses on the production process are discussed by monitoring the populations on all of the quantum states.In particular,the spontaneous emission arising from the intermediate state is investigated by the quantum master equation.The result reveals that the f-STA exhibits superior advantages over the f-STIRAP in producing the superposition states.

关 键 词：quantum population transfer shortcut to adiabaticity coherent superposition states dark states spontaneous emission 

分 类 号：O413[理学—理论物理]