双模纠缠相干态正交基的构建与纠缠度的计算  

Construction of orthogonal basis of two - mode entangled coherent state and its entanglement measure

作　　者：宋世学[1] 

机构地区：[1]济南大学物理科学与技术学院,山东济南250022

出　　处：《大学物理》2013年第10期1-4,共4页College Physics

基　　金：济南大学教学研究项目(XJP201206)资助

摘　　要：纠缠相干态是一类在量子信息领域有重要应用的连续变量纠缠态,由于相干态表象中的基矢不正交,导致其纠缠度计算的困难.本文给出了基于相干态本身的正交归一完备基的构建方法,简化了其纠缠度的计算,讨论了纠缠度的影响因素,并计算了常见的几种纠缠相干态的纠缠度.Entangled coherent states are a type of important continuous-variable entangled states in the processing of quantum information.However,it is complicated to calculate their entanglement due to the non-orthogonality of basis vectors in the representation of coherent state.We propose a construction method of a set of complete and orthogonal bases for two-mode entangled coherent states,and simplify the calculation of their entanglement.And also,the entanglement of several typical entangled states is calculated and discussed.

关 键 词：纠缠度 正交基 纠缠相干态 

分 类 号：O431.2[机械工程—光学工程]