Exploring Tripartite Quantum Correlations: Entanglement Witness and Quantum Discord

被引：0
作者：
M. A. Jafarizadeh
N. Karimi
A. Heshmati
D. Amidi
机构：
[1] Tabriz University,Department of Theoretical Physics and Astrophysics
[2] Farhangian University,Department of Science
[3] Islamic Azad University,Department of Physics, Shabestar Branch
来源：
International Journal of Theoretical Physics | 2017年 / 56卷
关键词：
Non-linear entanglement witnesses; Quantum discord; Distance measure of correlations; Tripartite quantum correlations;
D O I：
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学科分类号：
摘要：
In this study, we explore the tripartite quantum correlations by employing the quantum relative entropy as a distance measure. First, we evaluate the explicit expression for nonlinear entanglement witness (EW) of tripartite systems in the four dimensional space that lends itself to a straightforward algorithm for finding closest separable state (CSS) to the generic state. Then using nonlinear EW with specific feasible regions (FRs), quantum discord is derived analytically for the three-qubit and tripartite systems in the four dimensional space. Furthermore, we explicitly figure out the additivity relation of quantum correlations in tripartite systems.
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页码：1121 / 1131
页数：10
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