Entanglement properties of GHZ and W superposition state and its decayed states

• 作者: Xin-Feng Jin Li-Zhen Jiang Xiao-Yu Chen
• 来源期刊: 中国物理B（英文版）
• 年，卷（期）: 2021,（6）
• 所属期刊栏目: GENERAL
• 页码范围: 118-123
• 页数: 6页
• 语种: 英文
• DOI: 10.1088/1674-1056/abd74e

摘要

We use the generalized Wootters formula,the positive partial transpose (PPT) criterion and the matched entanglement witness,to detect entanglement of three-qubit GHZ and W superposition state and its decayed states.It shows that the results of the generalized Wootters formula in the part near the W state are tight.In the other parts,the PPT criterion is superior to the generalized Wootters formula.Furthermore,we investigate the relationship between entanglement and coherence.