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

doi:10.1088/1674-1056/22/8/080303

Abstract 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.

Keywords: entanglement sudden death extended Werner-like states ESD states ESD-free states

Received: 30 November 2012
Revised: 26 February 2013
Accepted manuscript online:

PACS:	03.65.Ud	(Entanglement and quantum nonlocality)
	03.67.-a	(Quantum information)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11074072).

Corresponding Authors: Fang Mao-Fa
E-mail: mffang@hunnu.edu.cn

Cite this article:

Yang Bai-Yuan (杨百元), Fang Mao-Fa (方卯发), Huang Jiang (黄江) Relation between initial conditions and entanglement sudden death for two-qubit extended Werner-like states 2013 Chin. Phys. B 22 080303

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