Boundary states for entanglement robustness under dephasing and bit flip channels

作     者：Hong-Mei Li Miao-Di Guo Rui Zhang Xue-Mei Su 李红梅;郭苗迪;张锐;苏雪梅

作者机构：College of Physics Jilin University 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2019年第28卷第10期

页      面：257-262页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

基　　金：Project supported by the National Key Research and Development Program of China(Grant No.2016YFE0200700) the National Natural Science Foundation of China(Grant Nos.61627820 and 61934003) 

主　　题：entanglement decoherence robustness local unitary equivalence 

摘      要：We investigate the robustness of entanglement for a multiqubit system under dephasing and bit flip channels. We exhibit the difference between the entanglement evolution of the two forms of special states, which are locally unitarily equivalent to each other and therefore possess precisely the same entanglement properties, and demonstrate that the difference increases with the number of qubits n. Moreover, those two forms of states are either the most robust genuine entangled states or the most fragile ones, which confirm that local unitary(LU) operations can greatly enhance the entanglement robustness of n-qubit states.