用被束缚在微腔中纠缠三原子实现量子控制非门  

Realization of quantum controlled not gate by entanglement of three atoms bound in micro-cavity

作　　者：彭永刚 PENG Yong-gang(Department of Applied Physics,College of Science,Nanjing University of Posts and Telecommunications,Nanjing,Jiangsu 210003,China;New Energy Technology Engineering Laboratory of Jiangsu Provence,Nanjing,Jiangsu 210003,China)

机构地区：[1]南京邮电大学理学院应用物理系,江苏南京210003 [2]江苏省新能源技术工程实验室,江苏南京210003

出　　处：《大学物理》2020年第11期26-30,共5页College Physics

摘　　要：在三个光学微腔场原子中使用激光驱动场和局域激光场,会诱导出三原子中的任意两原子纠缠及三原子纠缠,利用输入-输出技术及绝热近似理论,推导出Ising链模型的有效哈密顿量,用伴随数(concurrence)度量两原子纠缠,用内禀纠缠度量三原子纠缠,给出两原子和三原子纠缠随时间演化曲线,适当调控激光驱动场和局域激光场,在远距离三原子中能用任意两原子实现量子控制非门.Using laser driving field and local laser field in three optical micro cavity field,atoms can induce any two atom entanglement and three atom entanglement in three atoms.Using input-output technology and adiabatic approximation theory,the effective Hamiltonian of Ising chain model is derived.The two-atom entanglement is measured by the concurrence,and the three-atom entanglement is measured by intrinsic entanglement.The evolution curve of entanglement of two and three atoms with time is given.The laser driving field and the local laser field can be adjusted properly,and the quantum controlled not gate can be realized by any two atoms in the long distance three atoms.

关 键 词：光学微腔 原子纠缠 量子控制非门 有效哈密顿量 

分 类 号：O431.2[机械工程—光学工程]