频率变化场与原子相互作用系统中原子的信息熵压缩

利用J-C模型，考虑场频率随时间以正弦函数形式作小量变化,在旋波近似下,研究了二能级原子与单模辐射场相互作用系统中原子的信息熵压缩特性.利用数值计算方法给出原子的信息熵压缩因子随时间的演化曲线.研究结果表明:原子的信息熵仅在演化的初期呈现压缩效应,初始的原子分布角、光场强度和场频率随时间的变化对原子的信息熵压缩有明显影响.场频率随时间的变化对原子的信息熵压缩因子的演化具有调制作用,随场频率变化的幅值增大,调制作用增强,压缩效应减弱.

Entropy squeezing of the atom interacting with a Time-Varying

Following Jaynes-cummings model,entropy squeezing of the atom interacting with the single mode coherent field through single photon transition are investigated under rotating-wave approximation.The typical case-the field frequency variance with time in the form of sine has been considered.The influences of initial distribution angle of the atom,the initial mean photon number of the field, amplitude and angle frequency of the field frequency variance on entropy squeezing of the atom are discussed by numerical calculations.Calculation results indicate that initial distribution angle of the atom,initial mean photon number of the field and the field frequency variance influences violently the behavior of entropy squeezing of the atom; the evolution behavior of entropy squeezing of the atom versus scaled time are modulated by the function of varying frequency ;the larger the amplitude of the field frequency variance is ,the stronger modulation interaction of the field frequency variance is. Entropy squeezing of the atom weakens as the amplitude increases .