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Yuan, Ji-Bing; Kuang, Le-Man; Liao, Jie-Qiao; Kuang, LM , Hunan Normal Univ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Minist Educ, Changsha 410081, Hunan, Peoples R China
Amplification of quantum discord between two uncoupled qubits in a common environment by phase decoherence
Source PublicationJOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
KeywordSystem
AbstractWe study analytically the dynamic behaviours of quantum correlation measured by a quantum discord between two uncoupled qubits, which are immersed in a common Ohmic environment. We show that the quantum discord of the two non-interacting qubits can be greatly amplified or protected for certain initially prepared X-type states in the time evolution. In particular, it is found that stable amplification of the quantum discord exists for the case of two identical qubits, and the quantum discord can be protected for the case of two different qubits with a large detuning. It is also indicated that in general a sudden change of the quantum discord occurs in the time evolution at a critical time point t(c), and the discord amplification and protection may occur only in the time interval 0 < t <= t(c) for certain X-type states. This sheds new light on the creation and protection of quantum correlation.
2010
ISSN0953-4075
Volume43Issue:16Pages:-
Subject AreaPhysics
Indexed BySCI
Funding OrganizationNational Fundamental Research Program of China[2007CB925204]; National Natural Science Foundation of China[10775048]; Program for Changjiang Scholars and Innovative Research Team in University[IRT0964]; Hunan Provincial Education Department[08W012] ; National Fundamental Research Program of China[2007CB925204]; National Natural Science Foundation of China[10775048]; Program for Changjiang Scholars and Innovative Research Team in University[IRT0964]; Hunan Provincial Education Department[08W012] ; National Fundamental Research Program of China[2007CB925204]; National Natural Science Foundation of China[10775048]; Program for Changjiang Scholars and Innovative Research Team in University[IRT0964]; Hunan Provincial Education Department[08W012] ; National Fundamental Research Program of China[2007CB925204]; National Natural Science Foundation of China[10775048]; Program for Changjiang Scholars and Innovative Research Team in University[IRT0964]; Hunan Provincial Education Department[08W012]
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Cited Times:43[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/5058
Collection理论物理所科研产出_SCI论文
Corresponding AuthorKuang, LM , Hunan Normal Univ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Minist Educ, Changsha 410081, Hunan, Peoples R China
Recommended Citation
GB/T 7714
Yuan, Ji-Bing,Kuang, Le-Man,Liao, Jie-Qiao,et al. Amplification of quantum discord between two uncoupled qubits in a common environment by phase decoherence[J]. JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS,2010,43(16):-.
APA Yuan, Ji-Bing,Kuang, Le-Man,Liao, Jie-Qiao,&Kuang, LM , Hunan Normal Univ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Minist Educ, Changsha 410081, Hunan, Peoples R China.(2010).Amplification of quantum discord between two uncoupled qubits in a common environment by phase decoherence.JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS,43(16),-.
MLA Yuan, Ji-Bing,et al."Amplification of quantum discord between two uncoupled qubits in a common environment by phase decoherence".JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS 43.16(2010):-.
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