Demkov-Kunike transition dynamics in a nonlinear two-level system

作者：Feng, Ping; Wang, Wen-Yuan; Sun, Jian-An; Dou, Fu-Quan^*

来源：Nonlinear Dynamics, 2018, 91(4): 2477-2484.

DOI：10.1007/s11071-017-4026-8

• Demkov-Kunike transition
• Two-level system
• Nonlinear interaction
• Asymmetry of transition probability

We investigate the Demkov-Kunike transition in a nonlinear two-level system. We find that nonlinearity can dramatically affect the transition dynamics. We show the asymmetry of transition probability in different initial modes. For the weak interaction, the transition probability could be quickly stabilized at 100% in the initial state and could be optionally obtained from zero to 100% over a very wide range of external parameters in the initial state . For the strong interaction, the quantum transition of the two states could be completely blocked. In the adiabatic case, for different initial modes we analyze the asymmetry of transition probability by the eigenenergy level structure of the system. We also show the influence of static detuning on transition probability. Possible applications of our theory to actual physical systems are discussed.

• 出版日期2018-3
• 单位西北师范大学