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中文摘要：
研究了运动级联型三能级原子与单模场双光子相互作用过程中场（原子）熵的演化特性．讨论了当运动原子初始处于相干叠加态时，原子运动、场模函数、初始场的平均光子数n^-对场熵演化的影响．结果表明：熵演化的周期依赖于原子的运动和场模函数的取值，而初始场的平均光子数n^-只影响最大和次最小熵值，不改变熵演化的周期．
英文摘要：
The entropy evolution properties of field （atom） in a moving cascade three-level atom interacting with a single-mode field are studied through two photon transitions. When the atom is initially in coherent state, the influences of the atomic motion, the field-mode structure parameter and the initial average photon number on the evolution of the entropy are discussed. The results show that the entropy evolution period of the field is dependent of the atomic motion and the fleld-mode structure parameter. However, the parameter of the initial average photon number will neither lengthen nor shorten the entropy evolution period of the field, but the numerical values of maximum and sub-minimum of entropy will be affected by it.
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