The evolutional rules of linear entropy of field in the model of Jaynes-Cumming(JC) that acts each other with radiation field of a grey body are studied.

• 研究了与灰体辐射场相互作用的J-C模型中场的线性熵的演化规律,讨论了腔体吸收系数、入射场的光子数分布、热场的平均光子数对场的线性熵的影响。