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Li, CF; Zhao, XG; Li, CF , Shanghai Univ, Dept Phys, 99 Qixiang Rd, Shanghai 200436, Peoples R China.
Spatial rotation and time-evolution operator of two-level systems
Source PublicationINTERNATIONAL JOURNAL OF MODERN PHYSICS B
Keyword2-level Systems Dynamics
AbstractAll 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.
2000
ISSN0217-9792
Volume14Issue:1Pages:101-112
Subject AreaPhysics
Indexed BySCI
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/13028
Collection理论物理所科研产出_SCI论文
Corresponding AuthorLi, CF , Shanghai Univ, Dept Phys, 99 Qixiang Rd, Shanghai 200436, Peoples R China.
Recommended Citation
GB/T 7714
Li, CF,Zhao, XG,Li, CF , Shanghai Univ, Dept Phys, 99 Qixiang Rd, Shanghai 200436, Peoples R China.. Spatial rotation and time-evolution operator of two-level systems[J]. INTERNATIONAL JOURNAL OF MODERN PHYSICS B,2000,14(1):101-112.
APA Li, CF,Zhao, XG,&Li, CF , Shanghai Univ, Dept Phys, 99 Qixiang Rd, Shanghai 200436, Peoples R China..(2000).Spatial rotation and time-evolution operator of two-level systems.INTERNATIONAL JOURNAL OF MODERN PHYSICS B,14(1),101-112.
MLA Li, CF,et al."Spatial rotation and time-evolution operator of two-level systems".INTERNATIONAL JOURNAL OF MODERN PHYSICS B 14.1(2000):101-112.
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