Fidelity Susceptibility in the SU（2） and SU（1,1） Algebraic Structure Models  

作　　者：张宏标 田立君 

机构地区：[1]Institute of Theoretical Physics, Northeast Normal University, Changchun 130024 [2]Department of Physics, College of Science, Shanghai University, Shanghai 200444 [3]Shanghai Key Lab for Astrophysics, Shanghai 200234

出　　处：《Chinese Physics Letters》2010年第5期16-19,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No 10775092, Shanghai Leading Academic Discipline Project under Grant No S30105, and the Training Fund of NENU＇S Scientific Innovation Project under Grant No NENU-STC08018.

摘　　要：We mainly explore the fidelity susceptibility based on the Lie algebraic method. On physical grounds, the exact expressions of fidelity susceptibilities can be respectively obtained in SU（2） and SU（1,1） algebraic structure models, which are applied to one-body system and many-body systems, such as the single spin model, the single-mode squeeze harmonic oscillator model and the BCS model. In terms of the double-time Green-function method, our general conclusions are illustrated with two models which exhibit the fidelity susceptibilities at the finite temperature and T = O.We mainly explore the fidelity susceptibility based on the Lie algebraic method. On physical grounds, the exact expressions of fidelity susceptibilities can be respectively obtained in SU（2） and SU（1,1） algebraic structure models, which are applied to one-body system and many-body systems, such as the single spin model, the single-mode squeeze harmonic oscillator model and the BCS model. In terms of the double-time Green-function method, our general conclusions are illustrated with two models which exhibit the fidelity susceptibilities at the finite temperature and T = O.

分 类 号：O414.2[理学—理论物理] N94[理学—物理]