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Disentanglement in a quantum-critical environment
Sun, Zhe; Wang, Xiaoguang; Sun, C. P.; Wang, XG , Zhejiang Univ, Inst Modern Phys, Dept Phys, Hangzhou 310027, Peoples R China
2007
发表期刊PHYSICAL REVIEW A
ISSN1050-2947
卷号75期号:6页码:-
摘要We study the dynamical process of disentanglement of two qubits and two qutrits coupled to an Ising spin chain in a transverse field, which exhibits a quantum phase transition. We use the concurrence and negativity to quantify entanglement of two qubits and two qutrits, respectively. Explicit connections between the concurrence (negativity) and the decoherence factors are given for two initial states, the pure maximally entangled state and the mixed Werner state. We find that the concurrence and negativity decay exponentially with fourth power of time in the vicinity of the critical point of the environmental system.
部门归属Zhejiang Univ, Inst Modern Phys, Dept Phys, Hangzhou 310027, Peoples R China; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
关键词Heisenberg-chains Entanglement Separability States
学科领域Physics
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收录类别SCI
WOS记录号WOS:000247624300050
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被引频次:105[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/5719
专题理论物理所1978-2010年知识产出
通讯作者Wang, XG , Zhejiang Univ, Inst Modern Phys, Dept Phys, Hangzhou 310027, Peoples R China
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GB/T 7714
Sun, Zhe,Wang, Xiaoguang,Sun, C. P.,et al. Disentanglement in a quantum-critical environment[J]. PHYSICAL REVIEW A,2007,75(6):-.
APA Sun, Zhe,Wang, Xiaoguang,Sun, C. P.,&Wang, XG , Zhejiang Univ, Inst Modern Phys, Dept Phys, Hangzhou 310027, Peoples R China.(2007).Disentanglement in a quantum-critical environment.PHYSICAL REVIEW A,75(6),-.
MLA Sun, Zhe,et al."Disentanglement in a quantum-critical environment".PHYSICAL REVIEW A 75.6(2007):-.
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