[1]钟鸣,刘小贤.一维量子XX-ZZ模型的量子相变[J].南京师大学报(自然科学版),2010,33(04):58-62.
　Zhong Ming,Liu Xiaoxian.Quantum Phase Transitions of One-Dimensional XX-ZZ Model[J].Journal of Nanjing Normal University(Natural Science Edition),2010,33(04):58-62.
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一维量子XX-ZZ模型的量子相变()
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《南京师大学报（自然科学版）》[ISSN:1001-4616/CN:32-1239/N]

卷:
第33卷
期数:
2010年04期
页码:
58-62
栏目:
物理学
出版日期:
2010-12-20

文章信息/Info

Title:
Quantum Phase Transitions of One-Dimensional XX-ZZ Model
作者:
钟鸣;刘小贤;
南京师范大学物理科学与技术学院, 江苏南京210097
Author(s):
Zhong Ming; Liu Xiaoxian
School of Physics and Technology,Nanjing Normal University,Nanjing 210097,China
关键词:
量子XX-ZZ模型;  量子相变;  协作参量;  保真度;  李杨零点
Keywords:
quantum XX-ZZ mode; l quantum phase transition;  concurrence;  fidelity;  Lee-Yang zeros
分类号:
O431.2
摘要:
讨论了一维量子XX-ZZ模型的量子相变类型,数值研究了协作参量、保真度在相变点附近的行为和李-杨零点的分布情况.发现系统同时存在一级和二级相变,对应的保真度行为和李杨零点分布有所区别,但协作参量只能标识二级相变,不能显示一级相变.
Abstract:
The quantum phase transitions o f one-d im ensiona lXX-ZZ m ode l are d iscussed. The behav iors o f concurrence, fidelity near the critical po ints and the distribution o f Lee-Yang zero s are stud ied num er ica lly. It is found that the behav iors o f fide lity and Lee-Yang zero s can d istingu ish the first order and second order phase transitions. But the concurrence can only character ize the second o rder phase trans ition o f th is m odel .

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备注/Memo

备注/Memo:
基金项目: 江苏省高校自然科学基础研究项目( 10KJB140004) . 通讯联系人: 钟 鸣, 讲师, 研究方向: 凝聚态理论和统计物理. E-m ail:mzhong@ njnu. edu. cn
更新日期/Last Update: 2013-04-08