Comparative Study of Entanglement and Wigner Function for Multi-Qubit GHZ-Squeezed State

• 来源期刊: 理论物理通讯（英文版）
• 年，卷（期）: 2017,（12）
• 页码范围: 729-734
• 页数: 6页
• 语种: 英文
• DOI: 10.1088/0253-6102/68/6/729

摘要

In this paper we address the possibility of using the Wigner function to capture the quantum entanglement present in a multi-qubit system.For that purpose,we calculate both the degree of entanglement and the Wigner function for mixed tripartite squeezed states of Greenberger-Horne-Zeilinger (GHZ) type then we compare their behaviors.We show that the role of Wigner function in detecting and quantifying bipartite quantum correlation [Int.J.Mod.Phys.B 30 (2016) 1650187] may be generalized to the multipartite case.