%0 Journal Article
%T The entanglement between the boundary qubits in the five-qubit Heisenberg XX open chain<br>量子位Heisenberg XX开链中边界量子位之间的纠缠
%A Xi Xiao-Qiang
%A Chen Wen-Xue
%A Liu Qi
%A Yue Rui-Hong
%A <br>惠小强
%A 陈文学
%A 刘起
%A 岳瑞宏
%J 物理学报
%D 2006
%I 
%X Heisenberg XX open chain is very important in the study of quantum state transition. In this paper, we calculate the entanglement between the boundary qubits in the five-qubit Heisenberg XX open chain. When introducing magnetic impurity and system impurity and they satisfy linear relation, the system can be solved exactly, and there exist entanglement between the boundary qubits. Choosing the magnetic and system impurity properly, the boundary entanglement can get the maximal value 0.5.
%K Heisenberg XX open chain
%K boundary entanglement
%K impurity<br>HeisenbergXX开链
%K 边界纠缠
%K 杂质
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=DC6137CE68512121&yid=37904DC365DD7266&vid=E514EE58E0E50ECF&iid=B31275AF3241DB2D&sid=F5E918FB1DCFB1A1&eid=CF2D90CFC98D9434&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=30