CAJ | 학술논문

利用代数动力学方法，在多光子跃迁过程的J-C模型中，研究运动原子与薛定谔猫态相互作用系统中的纠缠特性，讨论了原子初始处于基态的几率、原子运动速度、跃迁光子数、初始光场强度、失谐量以及薛定谔猫态中两宏观相干态的相位角等物理参量，对系统纠缠度的影响。数值计算表明，跃迁光子数的奇偶值对系统的纠缠特性有很大影响，跃迁光子数为奇数时，失谐量的变化使系统出现退纠缠现象，原子运动速度的增大使系统纠缠度的变化频率增大，纠缠度减小；跃迁光子数为偶数，原子初始处于基态的几率大于激发态的几率时，系统也会出现退纠缠现象，但原子的运动速度对系统的纠缠特性不产生影响。
이용대수동역학방법，재다광자약천과정적J-C모형중，연구운동원자여설정악묘태상호작용계통중적규전특성，토론료원자초시처우기태적궤솔、원자운동속도、약천광자수、초시광장강도、실해량이급설정악묘태중량굉관상간태적상위각등물리삼량，대계통규전도적영향。수치계산표명，약천광자수적기우치대계통적규전특성유흔대영향，약천광자수위기수시，실해량적변화사계통출현퇴규전현상，원자운동속도적증대사계통규전도적변화빈솔증대，규전도감소；약천광자수위우수，원자초시처우기태적궤솔대우격발태적궤솔시，계통야회출현퇴규전현상，단원자적운동속도대계통적규전특성불산생영향。
Entanglement degrees in an interacting system of moving atom and Schr?dinger cat state were studied by using the fully quantum theory and algebraic dynamics in the J-C model.The influence of the probability of atom in the ground,the velocity of atomic motion,the transition photon number,the original strength of the light field,the detuning and the two macroscopic coherent phase angles in the Schr?dinger cat state on the entanglement properties of the system are discussed.The numerical results show that the odd or even transition photon number can produce great influence on the entanglement of the system.As the transition photon number is odd,the quantity of detuning can make the entanglement disap-pear suddenly.The increase of the velocity of atomic motion will make entanglement degrees decrease,and transition frequency becomes faster.When the transition photon number is even,and the probability of atom in the ground state is greater than that of atom in the excited state,it will make the entanglement degrees vanish suddenly.But under the same condition,the velocity of atomic motion will not affect the entanglement properties.