宏观小维格纳岛的局域对称性和有序-无序转变
Local Symmetries and Order-Disorder Transitions in Small Macroscopic Wigner Islands
摘要：
讨论了局域有序性对小维格纳岛无序化的影响。第一个无序步骤是由时间关联函数证明的，并且与导致配置转变的个体激发相关联，该个体激发对局部对称性非常敏感。其次是另外两个过渡，对应于正交和径向扩散，其中个人和集体激发发挥了重要作用。最后，我们表明，相反的大系统，通常是通过林德曼标准的集体激发这样的小系统的重点，必须仔细，以清楚地确定在整个无序过程中的相对贡献。
英文摘要：
The influence of local order on the disordering scenario of small Wigner islands is discussed. A first disordering step is put in evidence by the time correlation functions and is linked to individual excitations resulting in configuration transitions, which are very sensitive to the local symmetries. This is followed by two other transitions, corresponding to orthoradial and radial diffusion, for which both individual and collective excitations play a significant role. Finally, we show that, contrary to large systems, the focus that is commonly made on collective excitations for such small systems through the Lindemann criterion has to be made carefully in order to clearly identify the relative contributions in the whole disordering process.
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