Identifying the order of a quantum phase transition by means of Wehrl entropy in phase space

被引：17
|
作者：
Castanos, Octavio [1 ]
Calixto, Manuel [2 ]
Perez-Bernal, Francisco [3 ]
Romera, Elvira [4 ,5 ]
机构：
[1] Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, Mexico
[2] Univ Granada, Fac Ciencias, Dept Matemat Aplicada, E-18071 Granada, Spain
[3] Univ Huelva, Fac Ciencias Expt, Dept Fis Aplicada, Huelva 21071, Spain
[4] Univ Granada, Dept Fis Atom Mol & Nucl, E-18071 Granada, Spain
[5] Univ Granada, Inst Carlos Fis Teor & Computac 1, E-18071 Granada, Spain
来源：
PHYSICAL REVIEW E | 2015年 / 92卷 / 05期
关键词：
RENYI ENTROPY; DICKE-MODEL; PROPAGATION; CONJECTURE; SIGNATURES; SHAPES; CHAOS; PROOF;
D O I：
10.1103/PhysRevE.92.052106
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
We propose a method to identify the order of a quantum phase transition by using area measures of the ground state in phase space. We illustrate our proposal by analyzing the well known example of the quantum cusp and four different paradigmatic boson models: Dicke, Lipkin-Meshkov-Glick, interacting boson model, and vibron model.
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页数：7
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