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题名: Disentanglement in a quantum-critical environment
作者: Sun, Zhe ;  Wang, Xiaoguang ;  Sun, C. P.
刊名: PHYSICAL REVIEW A
出版日期: 2007
卷号: 75, 期号:6, 页码:-
关键词: HEISENBERG-CHAINS ;  ENTANGLEMENT ;  SEPARABILITY ;  STATES
学科分类: Physics
通讯作者: Wang, XG , Zhejiang Univ, Inst Modern Phys, Dept Phys, Hangzhou 310027, Peoples R China
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
英文摘要: 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.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000247624300050
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5719
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Sun, Zhe,Wang, Xiaoguang,Sun, C. P.. Disentanglement in a quantum-critical environment[J]. PHYSICAL REVIEW A,2007,75(6):-.
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