具有Dzyaloshinskii-Moriya相互作用的XX模型中的热纠缠

摘要

研究两量子比特海森堡XX模型中热纠缠的性质.考虑自旋之间沿X和Y方向的Dzyaloshinskii-Moriya (DM)相互作用,计算出两量子比特之间的共生纠缠度.研究结果表明:对于铁磁和反铁磁这两种情形,沿X和y方向的DM相互作用对热纠缠和临界温度的影响是不同的.因此选择和调整合适的X和Y方向的DM相互作用参数,可以有效地控制和提高热纠缠.%We studied the properties of thermal entanglement in one-dimention two-qubit Heisenberg model, where Dzyaloshinskii-Moriya (DM) interaction between spin with x-component and y-component was considered and concurrence was calculated to research this entanglement property.The results showed that on the case of ferromagnetic and antiferromagnetic, interaction had different effects on the entanglement and critical temperature.Therefore, the entanglement could be controlled and enhanced by choosing appropriate interaction between x-component and y-component.