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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 Publication | JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
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| Keyword | System |
| Abstract | 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. |
| 2010 | |
| ISSN | 0953-4075 |
| Volume | 43Issue:16Pages:- |
| Subject Area | Physics |
| Indexed By | SCI |
| Funding Organization | 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] |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.itp.ac.cn/handle/311006/5058 |
| Collection | 理论物理所科研产出_SCI论文 |
| Corresponding Author | Kuang, 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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| Amplification of qua（532KB） | 开放获取 | License | Application Full Text | |||
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