Geometric Quantum Discord of a Two-Qutrit System Under Decoherence at Finite Temperature

被引：2

作者：

Guo, You-neng ^{[1
,2
,3
]}

Liu, Zhen-ke ^{[4
]}

Tian, Qing-long ^{[5
]}

Zhang, Gang-lin ^{[1
]}

Wang, Guo-you ^{[6
]}

Zeng, Ke ^{[1
]}

机构：

[1] Changsha Univ, Coll Elect & Commun Engn, Changsha 410022, Hunan, Peoples R China

[2] Hunan Normal Univ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Minist Educ, Changsha 410081, Hunan, Peoples R China

[3] Hunan Normal Univ, Dept Phys, Changsha 410081, Hunan, Peoples R China

[4] First High Sch Changsha, Changsha 410005, Hunan, Peoples R China

[5] Changsha Univ, Coll Math & Comp Sci, Changsha 410022, Hunan, Peoples R China

[6] Hunan Univ Technol, Coll Sci, Zhuzhou 412008, Peoples R China

来源：

INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS | 2018年 / 57卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Geometric quantum discord; Finite temperature; Weak measurement and measurement reversal; ENTANGLEMENT;

D O I：

10.1007/s10773-018-3674-x

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The dynamics and protection of geometric quantum discord (GQD) for a two-qutrit system under amplitude damping channel with finite temperature have been studied in detail. By using of a lower bound of GQD, numerical results show that the GQD dynamics suffering from amplitude damping channels is more robust against the decoherence at lower temperature. Moreover, by combining weak measurement with measurement reversal, we have also investigated the protecting of the GDQ for a two-qutrit system under decoherence. It is found that the measurement technique can effectively protect the GQD against decoherence at lower temperature, but fails to protect GQD at higher temperature of channel.

引用

页码：1471 / 1478

页数：8

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