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

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成果类型:
期刊论文
作者:
Guo, You-neng;Liu, Zhen-ke;Tian, Qing-long;Zhang, Gang-lin;Wang, Guo-you;Zeng, Ke
通讯作者:
Zeng, K;Tian, QL
作者机构:
[Zeng, Ke; Zhang, Gang-lin; Guo, You-neng] Changsha Univ, Coll Elect & Commun Engn, Changsha 410022, Hunan, Peoples R China.
[Wang, Guo-you] Hunan Univ Technol, Coll Sci, Zhuzhou 412008, Peoples R China.
[Liu, Zhen-ke] First High Sch Changsha, Changsha 410005, Hunan, Peoples R China.
[Guo, You-neng] Hunan Normal Univ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Minist Educ, Changsha 410081, Hunan, Peoples R China.
[Guo, You-neng] Hunan Normal Univ, Dept Phys, Changsha 410081, Hunan, Peoples R China.
通讯机构:
[Zeng, Ke] Changsha Univ, Coll Elect & Commun Engn, Changsha 410022, Hunan, Peoples R China.
[Tian, Qing-long] Changsha Univ, Coll Math & Comp Sci, Changsha 410022, Hunan, Peoples R China.
语种:
英文
关键词:
Geometric quantum discord;Finite temperature;Weak measurement and measurement reversal
期刊:
International Journal of Theoretical Physics
ISSN:
0020-7748
年:
2018
卷:
57
期:
5
页码:
1471-1478
文献类别:
WOS:Article
所属学科:
ESI学科类别:物理学;WOS学科类别:Physics, Multidisciplinary
入藏号:
基金类别:
National Natural Science Foundation of China [11747107, 11374096]; Scientific Research Project of Hunan Province Department of Education [16C0134, 17C0133]; Natural Science Foundation of Hunan Province [2017JJ3346, 14JJ2134]; Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education [QSQC1403, QSQC1411]; Project of Science and Technology Plan of Changsha [ZD1601071, K1705022]
机构署名:
本校为其他机构
院系归属:
理学院
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.
参考文献:
Ali M, 2010, PHYS REV A, V81, DOI 10.1103/PhysRevA.81.042303
Ann K, 2007, PHYS REV A, V76, DOI 10.1103/PhysRevA.76.044101
Behzadi N, 2017, QUANTUM INF PROCESS, V16, DOI 10.1007/s11128-017-1698-4
Collins D, 2002, PHYS REV LETT, V88, DOI 10.1103/PhysRevLett.88.040404
Dakic B, 2010, PHYS REV LETT, V105, DOI 10.1103/PhysRevLett.105.190502

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