Amplification of quantum discord between two uncoupled qubits in a common environment by phase decoherence
文献类型：期刊论文
| 作者 | Kuang, Le-Man; Liao, Jie-Qiao; Yuan, Ji-Bing; Kuang, LM , Hunan Normal Univ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Minist Educ, Changsha 410081, Hunan, Peoples R China |
| 刊名 | JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
 |
| 出版日期 | 2010 |
| 卷号 | 43期号:16页码:- |
| 关键词 | System |
| ISSN号 | 0953-4075 |
| 英文摘要 | 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. |
| 学科主题 | Physics |
| URL标识 | 查看原文 |
| WOS记录号 | WOS:000280631700021 |
| 公开日期 | 2012-08-02 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/5058]  |
| 专题 | 理论物理研究所_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 | Kuang, Le-Man,Liao, Jie-Qiao,Yuan, Ji-Bing,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 | Kuang, Le-Man,Liao, Jie-Qiao,Yuan, Ji-Bing,&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 | Kuang, Le-Man,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):-. |
入库方式： OAI收割
来源：理论物理研究所
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