Quantum phase transition and entanglement in Li atom system

作     者：SI LiMing1 & HOU JiXuan2 1 Department of Electronic Engineering, School of Information Science and Technology, Beijing Institute of Technology, Beijing 100081, China 2 Laboratoire de Chimie, UMR 5182 CNRS, Ecole Normale Supérieure de Lyon, 46, Allée d’Italie, F-69364 Lyon Cedex 07, France 

作者机构：Department of Electronic Engineering School of Information Science and Technology Beijing Institute of Technology Beijing China Laboratoire de Chimie UMR 5182 CNRS Ecole Normale Supérieure de Lyon Lyon Cedex 07 France 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学：物理学、力学、天文学（英文版）)

年 卷 期：2008年第51卷第11期

页      面：1677-1681页

核心收录：

学科分类：0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 070205[理学-凝聚态物理] 08[工学] 0702[理学-物理学] 

主　　题：quantum phase transition entanglement von Neumann entropy 

摘      要：By use of the exact diagonalization method, the quantum phase transition and en- tanglement in a 6-Li atom system are studied. It is found that entanglement appears before the quantum phase transition and disappears after it in this exactly solvable quantum system. The present results show that the von Neumann entropy, as a measure of entanglement, may reveal the quantum phase transition in this model.