于长水

个人信息Personal Information

教授

博士生导师

硕士生导师

主要任职:物理学院党委书记

其他任职:无

性别:男

毕业院校:大连理工大学

学位:博士

所在单位:物理学院

学科:理论物理

办公地点:313

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THE WITNESS OF SUDDEN CHANGE OF GEOMETRIC QUANTUM CORRELATION

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论文类型:期刊论文

发表时间:2014-04-01

发表刊物:QUANTUM INFORMATION & COMPUTATION

收录刊物:SCIE、Scopus

卷号:14

期号:5-6

页面范围:454-466

ISSN号:1533-7146

关键字:Quantum discord; sudden change; quantum correlation

摘要:In this paper, we give a sufficient and necessary condition (witness) for the sudden change of geometric quantum discord by considering mathematical definition of the discontinuity of a function. Based on the witness, we can find out various sudden changes of quantum correlation by considering both the Markovian and the non-Markovian cases. In particular, we can accurately find out critical points of the sudden changes even though they are not quite obvious in the graphical representation. In addition, one can also find that sudden change of quantum correlation, like the frozen quantum correlation, strongly depends on the choice of the quantum correlation measure.