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中文摘要：
基于代数动力学和纠缠测度的基本概念，研究了时间相关的任意外场驱动的海森堡XXX-模型下的双量子比特纠缠态随时间演化的性质．可以证明，纠缠测度仅仅由耦合常量和外场的强度决定的,通过进一步研究发现，在任意恒定外场的驱动下，热域纠缠测度是一个与耦合常量J，温度T以及外场大小有关的函数．
英文摘要：
Based on algebraic dynamics and the concept of the concurrence of the entanglement, we investigate the evolutive properties of the Two-Qubit entanglement that formed by Heisenberg XXX models under a time-dependent arbitrary external field. For this system, the property of the concurrence that is only dependent on the coupling constant J and total values of the external field is proved. Furthermore, we found that the thermal concurrence of the system under a static arbitrary external field is a function of the coupling constant J, temperature T and the magnitude of external field.
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