Separability of evolving W state in a noise environment

• 作 者: Qian-Tong Men Li-Zhen Jiang Xiao-Yu Chen
• 机 构: College of Information and Electronic Engineering, Zhejiang Gongshang University, Hangzhou 310018,Zh
• 出 处: 理论物理通讯（英文版）
• 发表日期: 2021年4期
• 关键词: entanglement witness separable criterion PPT criterion W state

Entanglement is an important resource for quantum information processing.We provide a new entanglement witness to detect the entanglement of an evolving W state.Our results show that the new entanglement witness matches the evolving W state better than other witnesses or methods.The new witness significantly improves the performance of entanglement detection for some three-qubit states.