CAJ | 학술논문

研究了一个 X 型态两量子比特由量子谐错测定的量子关联动力学特性的解析解和数值解，并与纠缠进行比照，指出了共生纠缠度与量子谐错间的差别，得到共生纠缠度出现纠缠突然死亡（ESD）处量子谐错不会。也指出了对于所研究的模型，用量子谐错量度量子关联比用共生纠缠度更具鲁棒性。进一步说明了量子谐错也反映了量子关联在系统 AB 和 ab 间的转移。
연구료일개 X 형태량양자비특유양자해착측정적양자관련동역학특성적해석해화수치해，병여규전진행비조，지출료공생규전도여양자해착간적차별，득도공생규전도출현규전돌연사망（ESD）처양자해착불회。야지출료대우소연구적모형，용양자해착량도양자관련비용공생규전도경구로봉성。진일보설명료양자해착야반영료양자관련재계통 AB 화 ab 간적전이。
The dynamic behaviours of quantum correlation measured by quantum discord are studied analytically and numerically for a two - qubit X states .The dynamics of entanglement with that of quantum discord are compared , and it is pointed out the difference between quantum discord and concurrence . It is concluded that quantum discord doesn't exhibit sudden death where concurrence can does . It is also indicated that quantum correlation in term of quantum discord is more robust than concurrence for discussed model .Moreover , it is also explained that quantum discord transfers between the subsystems AB and ab .