在多能级∧系统中运用“部分受激拉曼绝热通道”制备相干叠加态(英文)

Creation of coherent superposition state by fraction stimulated Raman adiabatic passage in serial multi-A-type system

我们给出了在A型五能级系统中制备| 3>态和| 5>态的连续叠加态的方法,这种方法是部分受激拉曼绝热通道的扩充。但是它又不同于部分受激拉曼绝热通道,我们设计了新的斯托克斯脉冲和相应的泵浦脉冲。进而应用数值方法讨论了脉冲驰豫时间和失谐量对该方法的影响.数值结果表明要制备任意的叠加态要满足双光子共振.这种方法可以推广到多能级A系统中制备任意两个下面能级的叠加态.

We obtaiend the technique for creation of arbitrary coherent superposition state of ｜3〉populated state and ｜5〉 state in Five-level ∧-type system. It is based on an extension of the technique of fractional stimulated Raman adiabatic passage （f-STIRAP）. In this paper,we devise a new pulse sequence of Stokes laser and Pump laser,one can get any desired superposition by changing the ratio of the second Pump pulse to the second Stokes pulse when they vanished. Furthermore, we provide numerical simulation of the robustness against variations in the pulse delay, and the detuning. In order to create desired superposition state, we keep two-photon resonance. And this method can be used to create coherent superposition state of any two lower states in serial multi-∧-type System by fraction-STIRAP. Key words： coherent superposition state, fractional stimulated Raman adiabatic passage, serial multi-∧- type system, population