CAJ | 학술논문

利用量子Fisher信息研究了多粒子纠缠态的纠缠特性，该纠缠态由四个狄克态叠加而成。通过研究叠加系数和相对相位对量子Fisher信息的影响研究多粒子纠缠态的纠缠特性。结果：表明量子Fisher信息是叠加系数的周期函数。但其大小随相对相位和总粒子数变化，相对相越大或位粒子数越多，多粒子纠缠态的纠缠程度越高。
이용양자Fisher신식연구료다입자규전태적규전특성，해규전태유사개적극태첩가이성。통과연구첩가계수화상대상위대양자Fisher신식적영향연구다입자규전태적규전특성。결과：표명양자Fisher신식시첩가계수적주기함수。단기대소수상대상위화총입자수변화，상대상월대혹위입자수월다，다입자규전태적규전정도월고。
The entangled behaviors of a multi-particle entangled state was investigated with quantum Fisher information, where the entangled state is superposed by four Dicke states. The entangled behaviors can be studied by investigating superposition coeffi-cient and relative phase’ s influence on quantum Fisher information. Its shown that quantum Fisher information is a periodic func-tion of superposition coefficient. The value of quantum Fisher information changes with superposition coefficient and the total number of particles. The more the relative phase or the total number of particles is, the higher the degree of entanglement of the multi-particle entangled state is.