双模压缩真空态与运动原子相互作用系统的场熵演化特性

The Evolution Properties of the Field Entropy in the System of Two-mode Squeezing Vacuum Field with Atomic Motion

利用全量子理论,研究了双模压缩真空场与运动原子相互作用系统的场熵演化特性,讨论了不同初始状态态下原子的运动速度、模场结构对场熵的影响。结果表明,场熵通过时间因子sin2(εpgt/2)度与场模结构参数,原子运动和场模结构引起了附加的“熵振荡”。

The entropy evolution properties of field in the system of two-mode squeezing vacuum field interacting with the atomic motion are studied by means of quantum theory. The influences of atomic motion and the field structure, in different initial states are discussed emphatically. The results show that the field entropy is determined by the velocity of the atomicmotion and the parameter of the field mode structure through time parameter sin^2（εpgt/2）/εp/2.The atomic motion and theparameter of the field mode structure lead to additional vibration entropy.