Probing Berezinskii-Kosterlitz-Thouless Phase Transition of Spin-Half XXZ Chain by Quantum Fisher Information

The Berezinskii-Kosterlitz-Thouless phase transition of spin-1/2 XXZ chain is reinvestigated by the quantum Fisher information.Quantum Fisher informations of the whole N sites and the partial N/3 sites display remarkably similar behaviors near the critical point.The critical exponent of quantum Fish...

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Bibliographic Details
Published inCommunications in theoretical physics Vol. 63; no. 3; pp. 279 - 284
Main Author 郑强 姚尧 徐勋卫
Format Journal Article
LanguageEnglish
Published 01.03.2015
Subjects
Chains
Critical point
Exponents
Fisher信息
Phase transformations
Theoretical physics
信息显示
信息费
探测
相变
自旋
量子
链
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Summary:The Berezinskii-Kosterlitz-Thouless phase transition of spin-1/2 XXZ chain is reinvestigated by the quantum Fisher information.Quantum Fisher informations of the whole N sites and the partial N/3 sites display remarkably similar behaviors near the critical point.The critical exponent of quantum Fisher information is obtained as β=0.47,which is consistent with the results obtained by the concurrence and quantum discord.
Bibliography:The Berezinskii-Kosterlitz-Thouless phase transition of spin-1/2 XXZ chain is reinvestigated by the quantum Fisher information.Quantum Fisher informations of the whole N sites and the partial N/3 sites display remarkably similar behaviors near the critical point.The critical exponent of quantum Fisher information is obtained as β=0.47,which is consistent with the results obtained by the concurrence and quantum discord.
ZHENG Qiang , YAO Yao , XU Xun-Wei （1School of Mathematics and Computer Science, Guizhou Normal University, Guiyang 550001, China 2Beijing Computational Science Research Center, Beijing 100084, China）
11-2592/O3
quantum phase transition; quantum fisher information; XXZ model
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0253-6102
1572-9494
DOI:10.1088/0253-6102/63/3/279