基于原子系综系统实现控制Hadamard门和制备多量子比特的W-type态  

IMPLEMENTATION OF CONTROLLED-HADAMARD GATE AND GENERATION OF W-TYPE STATE BASED ON ATOMIC ENSEMBLES

作　　者：魏海红[1] 徐琳琳[1] 王发强[1] 梁瑞生[1] 

机构地区：[1]华南师范大学信息光电子科技学院,光子信息技术广东普通高校重点实验室,广东广州510631

出　　处：《华南师范大学学报（自然科学版）》2011年第1期58-61,共4页Journal of South China Normal University(Natural Science Edition)

基　　金：国家重点基础研究发展规划项目(2007CB307002);广东省自然科学基金项目(8151063201000051)

摘　　要：利用Rydberg阻滞机制,提出了实现基于原子系综系统的控制Hadamard门和制备n个量子比特W-type态的方案.该方案可以得到高保真度的n个量子比特W-type态,在量子信息处理方面具有可扩展性.A controlled-Hadamard gate based on the Rydberg blockade mechanism is constructed,and the n-qubit W-type state by using the controlled-Hadamard gate and C-NOT gate is prepared.The Rydberg state is chosen as the excited state（an assistant state）,and the two ground states are chosen to store information.The effect of the decay of the excited state can be neglected,because the implement time of the gate operation is much shorter than the lifetime of the ground state.A large number of atomic ensembles W-type states can be obtained by this scheme.This method also provides a way for the realization of scalable quantum computation.

关 键 词：原子系综 Rydberg阻滞 控制Hadamard门 W-type态 

分 类 号：O413[理学—理论物理]