非旋波近似的Zeno时间计算  

Calculating Zeno time in non-rotating wave approximation

作　　者：李兴敏[1,2] 严冬[2,3] 李超[1] 宋立军[2] 

机构地区：[1]长春理工大学理学院,吉林长春130022 [2]长春大学理学院,吉林长春130022 [3]吉林大学物理学院,吉林长春130012

出　　处：《量子电子学报》2013年第5期549-553,共5页Chinese Journal of Quantum Electronics

基　　金：国家自然科学基金(10947019;11204019);教育部科学技术研究计划重点项目(2011040);吉林省自然科学基金(20101514);吉林省教育厅科学技术研究计划项目(2012245);吉林省科技厅青年基金(201201140)

摘　　要：在非旋波近似条件下,利用中岛变换对二能级系统哈密顿量进行幺正转换,将耦合条件进行适当拓宽,在更加广泛的适应范围内计算Zeno时间,研究二能级系统非旋波项对Zeno时间的影响。计算发现,Zeno时间与二能级系统的能级间隔成反比关系,与旋波近似条件下的计算结果比较,非旋波近似条件的Zeno时间计算更加准确。同时表明,只有基于相同物理模型的非旋波项才可以使量子Zeno时间的计算更加精确。In the condition of non-rotating wave approximation, Nakajima transform was used to make a unitary transformation of the two-level system Hamiltonian, and coupling condition is broadened appropri- ately to calculate Zeno time in a much broader range in order to study the effect of non-rotating wave item on Zeno time in a two-level system. Calculating results show that Zeno time is in inverse proportion to the energy interval of the two-level system, which turns out to be more accurate compared with that with rotating wave approximation. In addition, only when compared in the same type of physical model can quantum Zeno time be more accurately described.

关 键 词：量子光学 Zeno时间 中岛变换 量子Zeno效应 非旋波近似 

分 类 号：O431.2[机械工程—光学工程]