两量子比特海森伯模型的热纠缠

Thermal entanglement in the two-qubit Heisenberg model

研究两粒子的XYZ海森伯模型的热纠缠态,并讨论了这个系统哈密顿量中的参数和温度对纠缠度的影响.结果表明:对于一定的温度,耦合常数的增加能够增加纠缠度,但是纠缠度却随着温度的增加而减小,直到临界温度时纠缠度为零.

In this paper, study the thermal entanglement of a two - qubit XYZ Heisenberg model, and show the influences for the concurrence of this system in terms of the parameters of the Hamihonian and T. Finally, obtain that increasing the absolute value of J increases the concurrence for a given T, but the concurrence decreases with the increase of temperature until it reaches the critical value of T, and becomes zero.