2n量子系统二参量一类态的量子相对熵纠缠度  

Relative Entropy of Entanglement for a Two-parameter Class ofStates in 2n Quantum System

作　　者：刘思平[1] 狄尧民[1] 

机构地区：[1]徐州师范大学物理与电子工程学院

出　　处：《量子光学学报》2008年第3期308-312,共5页Journal of Quantum Optics

基　　金：国家自然科学基金(60433050);徐州师范大学自然科学基金重点项目(06XLA05)

摘　　要：对于任意的两体量子系统,总可以通过局域操作和经典通讯变换成二参量的一类态。本文计算了2n量子系统的两参量一类态的量子相对熵纠缠度,找到了与其最接近的可分离态,得出了具体的解析表达式,并与其他纠缠的度量—负值度和形成纠缠度作了比较,三种纠缠的度量从大到小的依次为负值度、形成纠缠度和量子相对熵纠缠度。Any arbitrary state in bipartite quantum system can be transformed into a two-parameter class of states by means of local quantum operation and classical communication. In this paper, the quantum relative entropy of entanglement for this kind of states is calculated, the nearest separable states are found and the analytic expression of the entanglement is obtained. The comparation with two other measures of entanglement, the negativity and the entanglement of formation, is also made. The sequence of three measures from high to low is the negativity, the entanglement of formation and the relative entropy of entanglement.

关 键 词：两参量一类态 量子相对熵纠缠度 负值度 形成纠缠度 

分 类 号：O431[机械工程—光学工程]