| 非马尔科夫环境下耦合超导量子比特纠缠态的纠缠消相干 |
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| 引用本文： | 嵇英华,徐林.非马尔科夫环境下耦合超导量子比特纠缠态的纠缠消相干[J].量子电子学报,2011,28(1):58-64. |
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| 作者姓名： | 嵇英华 徐林 |
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| 作者单位： | 1 江西师范大学物理与通信电子学院, 江西 南昌 330022;
2 江西省光电子与通信重点实验室, 江西 南昌 330022 |
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| 摘 要： | 利用共生纠缠度比较详细地研究了一个超导耦合量子比特在非马尔可夫环境下纠缠消相干的演化。研究结果表明：对于不同纠缠初态下的超导耦合量子比特，由于环境作用的记忆反馈效应，处于热平衡环境中的耦合量子比特的纠缠度总是会单调地趋向于零。进一步的研究结果还表明：在非马尔可夫过程中会很快地出现纠缠的突然死亡，耗散越强，纠缠的死亡越快；而在马尔可夫过程中则是缓慢地趋向纠缠的死亡。
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| 关 键 词： | 量子光学 纠缠 耦合量子比特 非马尔可夫过程 共生纠缠度 |
| 收稿时间： | 2010-04-06 |
| 修稿时间： | 2010-05-07 |
Entanglement decoherence of coupled superconductor qubits entangled states in non-Markovian environment |
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| JI Ying-hua,XU Lin.Entanglement decoherence of coupled superconductor qubits entangled states in non-Markovian environment[J].Chinese Journal of Quantum Electronics,2011,28(1):58-64. |
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| Authors: | JI Ying-hua XU Lin |
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| Affiliation: | 1 College of Physics and Communication Electronics, Jiangxi Normal University, Nanchang 330022, China
2 Key Laboratory of Optoelectronic and Telecommunication of Jiangxi, Nanchang 330022, China |
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| Abstract: | The evolution of entangled decoherence of coupling superconducting qubits in non-Markovian environment is investigated in detail using concurrence function.The results show that,for coupling superconducting qubit under different entangled initial states,because of the role of memory feedback due to environmental effect,the entanglement of coupling superconducting qubits under a thermal bath always tends to zero monotonically.Further results also showed that,the sudden death of entanglement will soon occur i... |
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| Keywords: | quantum optics entanglement coupled qubits non-Markovian process concurrence |
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