Steered coherence and entanglement in the Heisenberg XX chain under twisted boundary conditions

• 作者: Yu-Hang Sun Yu-Xia Xie
• 来源期刊: 中国物理B（英文版）
• 年，卷（期）: 2021,（7）
• 所属期刊栏目: GENERAL
• 页码范围: 158-164
• 页数: 7页
• 语种: 英文
• DOI: 10.1088/1674-1056/abe1a9

摘要

We study steered coherence (SC) and entanglement in a three-spin Heisenberg XX model under twisted boundary conditions and show that their strengths can be significantly enhanced by tuning the twist angle.The optimal twist angle θopt for achieving the maximum l1 norm of SC is π in the region of weak field B and decreases gradually from π to O when B increases after a critical value,while for the relative entropy of SC,θopt equals π in the weak field region and O otherwise.The entanglement and the critical temperature above which the entanglement vanishes can also be significantly enhanced by tuning the twist angle from O to π.