摘要
采用纠缠的度量方法负性(Negativity)研究了自旋为1的两粒子海森伯XXZ链的纠缠特性.研究发现纠缠并非只会随Dzialoshinskii-Moriya(DM)相互作用的增加而增大,纠缠消失时的临界温度T C会因各项异性参数J z和DM相互作用的不同而不同.较大的J z能使得z方向DM相互作用的临界磁场增加.可以通过调节DM相互作用的方向、各项异性参数J z和磁场B来控制和生成纠缠.
The entanglement of two-particles Heisenberg XXZ chains with different Dzyaloshinskii-Moriya（DM） interaction is investigated.By means of negativity,the entanglement is calculated in detail as a function of the different parameter.We find that the entanglement will not be always enhanced by the increase of DM interaction.The critical temperature when entanglement disappeared varies with the different parameters J z and DM interaction.The entanglement as a function of magnetic field shows different properties for different x or z-component DM interaciton.Moreover,the entanglement can be controlled and enhanced by varying the distributions of the impurities,the strength of external magnetic field and the DM interaction.
出处
《大学物理》
北大核心
2013年第10期55-58,共4页
College Physics
基金
解放军理工大学预研基金资助课题
