Quasidynamical symmetry in an interacting boson model phase transition.
Quasidynamical symmetry in an interacting boson model phase transition.
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DOI：
10.1103/physrevlett.93.122502
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发表时间：
2004-02
影响因子：
8.6
通讯作者：
D. Rowe
中科院分区：
文献类型：
--
作者：
D. Rowe
在多玻色子模型中考察了强破缺相互作用下对称性的表观持久性。当控制参数的值从0到1时，该模型表现出分别与U（5）和O（6）对称性相关联的两个阶段之间的过渡。值得注意的事实是，尽管强混合的对称性的中间值的控制参数，该模型继续表现出其最接近的对称性极限的所有，但一个相对较窄的过渡区，变得越来越窄的玻色子数增加的特点。这一现象可以用准动力学对称性来解释。
The apparent persistence of symmetry in the face of strong symmetry-breaking interactions is examined in a many-boson model. The model exhibits a transition between two phases associated with U(5) and O(6) symmetries, respectively, as the value of a control parameter progresses from 0 to 1. The remarkable fact is that, in spite of strong mixing of the symmetries for intermediate values of the control parameter, the model continues to exhibit the characteristics of its closest symmetry limit for all but a relatively narrow transition region that becomes progressively narrower as the boson number increases. This phenomenon is explained in terms of quasidynamical symmetry.