Implementing ancilla-free phase covariant quantum cloning with atoms trapped in cavities

• 作 者: YE Liu XIONG Wei LI AiXia GUO
• 机 构: AnhuiKeyLaboratoryofInformationMaterial&,Devices,LaboratoryofQuantumInformation
• 出 处: 中国科学：物理学、力学、天文学英文版
• 发表日期: 2011年2期
• 关键词: 量子克隆 原子状态 协变 安克 最佳相位 状态检测 原子自发辐射 空间分隔 ancilla-free 1 to 2 optimal phase covarian
• 基金项目: This work was supported by the National Natural Science Foundation of China （Grant No. 11074002） and the Personal Development Foundation of Anhui Province （Grant No. 2008Z018）.

We propose a scheme to implement ancilla-free 1 to 2 optimal phase covariant quantum cloning with atoms trapped in cavities.In the scheme the W-class state of three atoms,which are individually trapped in three spatially separated cavities,is deterministi