用基本两位量子逻辑门实现n位量子逻辑门的研究  

n-bit quantum gate accomplished by two-bit quantum gates

作　　者：吕洪君[1] 郭俊旺[1] 彭斐[1] 吴天昊[1] 解光军[1] 

机构地区：[1]合肥工业大学电子科学与应用物理学院,安徽合肥230009

出　　处：《量子电子学报》2010年第1期26-30,共5页Chinese Journal of Quantum Electronics

基　　金：安徽省自然科学基金(090412038);安徽省人才开发基金(2007Z028)资助项目

摘　　要：量子电路是实现量子态幺正演化的手段,一位和两位门是构成量子电路的基础。Barenco用基本的两位量子逻辑门实现n位量子逻辑门功能,张登玉在Barenco的工作基础上对用基本的两位量子逻辑门实现n位量子逻辑门功能进行了改进。通过对Barenco方案和张登玉方案的分析和研究,提出了一个用基本的两位量子逻辑门实现n位量子逻辑门功能的新方案,该方案结构更简单,且所用的两位门更易于实现,同时指出和改正了张文的不太准确的结论。Quantum circuits are the tools of realizing the unitary evolution of quantum state, and they are mainly made up of one-bit and two-bit quantum gates. Barenco proposed a method for constructing n-bit quantum gate by using basic two-bit quantum gates in 1995. Zhang proposed the improved method for constructing n-bit quantum gate by using basic two-bit quantum gates in 2001. The method for constructing n-bit quantum gate by using basicstwo-bit quantum gates is proposed by improving the two methods mentioned. The scheme is more simple and easier to implement and the incorrect conclusion by Zhang is amended.

关 键 词：量子信息 量子逻辑电路 量子逻辑门 幺正变换 Toffoli门 

分 类 号：O431.2[机械工程—光学工程]