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Dynamical correlations of negativity and entropy for pure and mixed states in two coupled quartic oscillators
Hou, XW; Wan, MF; Ma ZQ(马中骐); Ma, ZQ
2011
发表期刊EUROPEAN PHYSICAL JOURNAL D
卷号62期号:2页码:#REF!
通讯作者Hou, XW (reprint author), Huazhong Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.
文章类型Article
摘要Various measures of entanglement have triggered considerable interest in the relationship between entanglement measures and other well-known quantities. As a demonstration, the dynamical correlation of negativity and entropy is studied in two coupled quartic oscillators for initial pure and mixed states that are respectively taken to be the products and mixed density matrices of coherent states and squeezed states on each oscillator. The correlation with energy is also considered. It is shown that for the initial pure states with a small magnitude, two negativities are positively correlated with the von Neumann entropy while they are anti-correlated with the energy of each oscillator in the weak coupling regime. For mixed states with a small magnitude the two negativities and the mutual entropy exhibit dominantly positive correlation, whereas those three quantities are dominantly anti-correlated with the sum of energies of two oscillators in the case of weak interactions. Such correlation behaviors in the mixed state with small magnitudes are most striking at the same step in maximal and minimal values and in oscillation. The differences in entropies and negativities between coherent states and squeezed states are discussed. These are useful for quantum entanglement and quantum information processing.
学科领域Optics; Physics
DOI10.1140/epjd/e2011-10476-x
收录类别SCI
WOS类目Optics ; Physics, Atomic, Molecular & Chemical
WOS记录号WOS:000290473100017
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被引频次:9[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/227368
专题理论物理室
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Hou, XW,Wan, MF,Ma ZQ,et al. Dynamical correlations of negativity and entropy for pure and mixed states in two coupled quartic oscillators[J]. EUROPEAN PHYSICAL JOURNAL D,2011,62(2):#REF!.
APA Hou, XW,Wan, MF,马中骐,&Ma, ZQ.(2011).Dynamical correlations of negativity and entropy for pure and mixed states in two coupled quartic oscillators.EUROPEAN PHYSICAL JOURNAL D,62(2),#REF!.
MLA Hou, XW,et al."Dynamical correlations of negativity and entropy for pure and mixed states in two coupled quartic oscillators".EUROPEAN PHYSICAL JOURNAL D 62.2(2011):#REF!.
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