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Amplification of quantum discord between two uncoupled qubits in a common environment by phase decoherence
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
发表期刊JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
ISSN0953-4075
卷号43期号:16页码:-
摘要We 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.
部门归属[Yuan, JB; Kuang, LM; Liao, JQ] Hunan Normal Univ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Minist Educ, Changsha 410081, Hunan, Peoples R China; [Yuan, JB; Kuang, LM; Liao, JQ] Hunan Normal Univ, Dept Phys, Changsha 410081, Hunan, Peoples R China; [Liao, JQ] Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China
关键词System
学科领域Physics
资助者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] ; 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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收录类别SCI
资助者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] ; 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]
WOS记录号WOS:000280631700021
引用统计
被引频次:38[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/5058
专题理论物理所1978-2010年知识产出
通讯作者Kuang, LM , Hunan Normal Univ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Minist Educ, Changsha 410081, Hunan, Peoples R China
推荐引用方式
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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