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

作　　者：Yu-Hang Sun Yu-Xia Xie 孙宇航;谢玉霞(School of Science,Xi'an University of Posts and Telecommunications,Xi'an 710121,China)

机构地区：[1]School of Science,Xi'an University of Posts and Telecommunications,Xi'an 710121,China

出　　处：《Chinese Physics B》2021年第7期139-144,共6页中国物理B（英文版）

基　　金：the National Natural Science Foundation of China(Grant No.11675129)。

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 angleθ_(opt)for achieving the maximum l_(1) norm of SC isπin the region of weak field B and decreases gradually fromπto 0 when B increases after a critical value,while for the relative entropy of SC,θ_(opt)equalsπin the weak field region and 0 otherwise.The entanglement and the critical temperature above which the entanglement vanishes can also be significantly enhanced by tuning the twist angle from 0 toπ.

关 键 词：quantum coherence ENTANGLEMENT twisted boundary conditions 

分 类 号：O469[理学—凝聚态物理]