双光子Jaynes-Cummings模型中量子力学通道与量子互熵

QUANTUM MECHANICAL CHANNEL AND QUANTUM MUTUAL ENTROPY IN THE TWO-PHOTON JAYNES-CUMMINGS MODEL 

用量子信息理论研究双光子JaynesCummings模型动力学.给出了表示原子态变化的量子力学通道,导出了量子互熵和原子约化熵,考察了初始场的位相相干性和原子能级的斯塔克位移对量子互熵的影响.结果表明:量子互熵周期性地演化,量子力学通道周期性地将原子初态的信息传送到终态,量子力学通道和量子互熵的特性依赖于初始场的位相相干性及原子能级的斯塔克位移.

We have studied the dynamics of the two\|photon Jaynes\|Cummings model (TPJCM) by using the quantum information theory, given the quantum mechanical channel representing the state change of atom, derived the quantum mutual entropy and reduced entropy of the atom, and examined the effects of the phase coherence of initial cavity field and the Stark shift of atomic levels on the quantum mutual entropy in the TPJCM. It is shown that quantum mutual entropy \{evolves\} periodically, quantum mechanical channel transmits periodically the information of atomic initial state to its final states, and quantum mechanical channel and mutual entropy are also dependent on the phase coherence of initial cavity field and on the Stark shift of atomic levels.