Comparison and control of the robustness between quantum entanglement and quantum correlation in an open quantum system
Comparison and control of the robustness between quantum entanglement and quantum correlation in an open quantum system
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开放量子系统中量子纠缠与量子相关鲁棒性的比较与控制
DOI：
10.1088/1674-1056/21/11/110304
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发表时间：
2012-11
影响因子：
1.7
通讯作者：
胡燕
中科院分区：
文献类型：
--
作者：
嵇英华;胡菊菊;胡燕
研究了环境退相干对耦合量子比特系统动力学和量子关联的影响。分析了纠缠度与初始纠缠度、初始量子态纯度的关系，以及它们与量子不协调的关系。结果表明，初始量子态纯度的降低会导致量子纠缠或量子失协的衰减，但量子失协的衰减明显慢于量子纠缠，相应地，量子失协的存活时间更长。进一步的研究表明，量子失谐和纠缠的鲁棒性依赖于初始量子态的纠缠度。纠缠度越高，量子不和谐比并发更健壮。反之亦然。量子不协调周期性地发生生与死，在一定条件下产生新生的量子不协调，同时也产生并发。
We investigate the influence of environmental decoherence on the dynamics of a coupled qubit system and quantum correlation. We analyse the relationship between concurrence and the degree of initial entanglement or the purity of initial quantum state, and also their relationship with quantum discord. The results show that the decrease of the purity of an initial quantum state can induce the attenuation of concurrence or quantum discord, but the attenuation of quantum discord is obviously slower than the concurrence's, correspondingly the survival time of quantum discord is longer. Further investigation reveals that the robustness of quantum discord and concurrence relies on the entanglement degree of the initial quantum state. The higher the degree of entanglement, the more robust the quantum discord is than concurrence. And the reverse is equally true. Birth and death happen to quantum discord periodically and a newborn quantum discord comes into being under a certain condition, so does the concurrence.
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非马尔可夫环境中耦合超导量子位的纠缠和退相干
影响因子：
1.7
作者：
嵇英华;胡菊菊
通讯作者：
胡菊菊
DOI：
10.1088/1751-8113/42/48/485301
发表时间：
2009-06
期刊：
Journal of Physics A: Mathematical and Theoretical
影响因子：
--
作者：
I. Sinayskiy;E. Ferraro;A. Napoli;A. Messina;Francesco Petruccione
通讯作者：
I. Sinayskiy;E. Ferraro;A. Napoli;A. Messina;Francesco Petruccione
影响因子：
8.6
作者：
Ollivier, H;Zurek, WH
通讯作者：
Zurek, WH
影响因子：
8.6
作者：
Mazzola, L.;Piilo, J.;Maniscalco, S.
通讯作者：
Maniscalco, S.
通过突然渐近解缠划分两个量子位希尔伯特空间
影响因子：
2.9
作者：
Li, Peng;Zhang, Qun;You, J. Q.
通讯作者：
You, J. Q.