Relation between initial conditions and entanglement sudden death for two-qubit extended Werner-like states

Yang Bai-Yuan; Fang Mao-Fa; Huang Jiang

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Relation between initial conditions and entanglement sudden death for two-qubit extended Werner-like states

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In this paper,the dynamical behavior of entanglement of an uncoupled two-qubit system,which interacts with independent identical amplitude damping environments and is initially prepared in the extended Werner-like (EWL) states,is investigated.The results show that whether entanglement sudden death (ESD) of an EWL state will occur or not depends on initial purity and concurrence.The boundaries between ESD states and ESD-free states for two kinds of EWL states are found to be different.Furthermore,some regions are shown where ESD states can be transformed into ESD-free states by local unitary operations.

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《中国物理：英文版》 |2013年第8期|264-268|共5页
作者
Yang Bai-Yuan; Fang Mao-Fa; Huang Jiang;
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Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control, Ministry of Education,and Department of Physics, Hunan Normal University, Changsha 410081, China;

Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control, Ministry of Education,and Department of Physics, Hunan Normal University, Changsha 410081, China;

Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control, Ministry of Education,and Department of Physics, Hunan Normal University, Changsha 410081, China;

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Relation between initial conditions and entanglement sudden death for two-qubit extended Werner-like states

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