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题名: Spatial rotation and time-evolution operator of two-level systems
作者: Li, CF ;  Zhao, XG
刊名: INTERNATIONAL JOURNAL OF MODERN PHYSICS B
出版日期: 2000
卷号: 14, 期号:1, 页码:101-112
关键词: 2-LEVEL SYSTEMS ;  DYNAMICS
学科分类: Physics
通讯作者: Li, CF , Shanghai Univ, Dept Phys, 99 Qixiang Rd, Shanghai 200436, Peoples R China.
部门归属: Shanghai Univ, Dept Phys, Shanghai 200436, Peoples R China; CCAST, World Lab, Beijing 100080, Peoples R China; Inst Appl Phys & Computat Math, Beijing 100088, Peoples R China; Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China
英文摘要: All the six kinds of rotation approach with the same form to the evolution problem of arbitrarily time-dependent two-level systems are investigated in this paper. A time-dependent two-level system can be viewed as a spin-1/2 system in a time-varying magnetic field. It is shown that for each kind of rotation approach, we can always find a rotating frame in which the direction of the effective magnetic field is fixed. This property reduces the problem of finding the time-evolution operator to the solution of a second-order differential equation. Applications are made to the J C model in quantum optics and the Landau-Zener model in resonance physics.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000085214200009
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/13028
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Li, CF,Zhao, XG. Spatial rotation and time-evolution operator of two-level systems[J]. INTERNATIONAL JOURNAL OF MODERN PHYSICS B,2000,14(1):101-112.
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