Relation between the E(5) symmetry and the interacting boson model beyond the mean-field approximation  

作　　者：ZHANG Yu LIU YuXin HOU ZhanFeng SUN Yang 

机构地区：[1]Department of Physics, Liaoning Normal University, Dalian 116029, China [2]Department of Physics and the National Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China [3]Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator, Lanzhou 720000, China [4]Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2011年第2期227-230,共4页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos.10425521, 10875077, 10935001, and 11005056);the Major State Basic Research Development Program (Grant No.2007CB815000)

摘　　要：In a unified algebraic scheme,we investigate the relation between the E(5) symmetry and the interacting boson model beyond the mean-field level.The results indicate that the E(5) symmetry is actually in between the critical point of the U(5)-O(6) transition and the O(6) limit but it is fairly close to the former based on the phase diagram of the interacting boson model at the large boson number limit.In addition,an algebraic Hamiltonian of the E(5)-β2n model is proposed.In a unified algebraic scheme,we investigate the relation between the E（5） symmetry and the interacting boson model beyond the mean-field level.The results indicate that the E（5） symmetry is actually in between the critical point of the U（5）-O（6） transition and the O（6） limit but it is fairly close to the former based on the phase diagram of the interacting boson model at the large boson number limit.In addition,an algebraic Hamiltonian of the E（5）-β^2n model is proposed.

关 键 词：quantum phase transition critical point E（5） symmetry nuclear structure 

分 类 号：O571.21[理学—粒子物理与原子核物理] O482[理学—物理]