中文摘要：

在场和非线性介质原子相互作用模型下，利用concurrence和约化Neumann熵两种纠缠量度，研究推广的二项式场态和原子基态的量子纠缠动力学．结果表明concurrence与约化Neumann熵是正关联占优势；在合适的条件下，纠缠在较长时间内几乎是不变的．这有利于量子信息过程．

英文摘要：

The dynamical entanglement in a model of the field interacted with atoms in a nonlinear medium is studied in terms of concurrence and the reduced Neumann entropy for the generalized binomial state of the field and the ground state of atoms. It is shown that concurrence is dominantly-positively correlated with the reduced Neumann entropy. The entanglement under suitable condition is nearly unchanged for a long time. This is useful for quantum information processing.