摘要
利用数值计算的方法,研究了耗散腔中双纠缠原子的量子信息保真度.讨论了光场的初始平均光子数一定的情况下腔的耗散系数对量子态保真度的影响,以及在腔的耗散一定的情况下光场的初始平均光子数对量子态保真度的影响.结果表明:腔的耗散和光场的初始平均光子数对原子和原子—光场系统的保真度的影响都很明显.
By means of numerical calculations,the fidelity of quantum information of two entangled atoms in the dissipative cavity were investigated.The influences of the cavity damping constant and the numerical value of initial mean photon number on the fidelities of quantum states was discussed.It was found that both of them affect the fidelities of atoms and of atom-cavity system obviously.
出处
《聊城大学学报（自然科学版）》
2010年第2期23-27,共5页
Journal of Liaocheng University:Natural Science Edition
基金
山东省自然科学基金(ZR2009AM019)
关键词
量子态保真度
耗散常数
双纠缠原子
密度算符
fidelity of quantum states
damping constant
two entangled atoms
density operator
