3对非最大纠缠粒子的确定性纠缠浓缩协议  

Protocol for deterministic entanglement concentration of three pairs of partially entangled particles

作　　者：张闻钊[1] 李文东[1] 史鹏[1] 顾永建[1] 

机构地区：[1]中国海洋大学物理系,青岛266100

出　　处：《物理学报》2011年第6期31-35,共5页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:60677044)资助的课题~~

摘　　要：在Nielsen定理和纠缠浓缩基本思想的基础上,对从2对非最大纠缠粒子中提取1对最大纠缠粒子的确定性纠缠浓缩协议进行了简化和改进,从而建立了一个从3对非最大纠缠粒子中提取2对最大纠缠粒子的确定性纠缠浓缩协议.该协议利用经典通信和局域操作并通过特定的正算符测度来实现,避免了概率性的风险.这有助于n对非最大纠缠粒子中提取k对最大纠缠粒子的确定性纠缠浓缩协议的最终确立.According to the Nielsens theorem and the basic idea of entanglement concentration, we improve and extend the deterministic entanglement concentration protocol that extracts one pair of maximally entangled particles out of two pairs of non-maximally entangled particles, thus establishing a deterministic entanglement concentration protocol that extracts two pairs of maximally entangled particles out of three pairs of non-maximally entangled particles in the way of the classical communication and local operation and the specific positive operator-valued measure. This is helpful for establishing a deterministic entanglement concentration protocol that extracts k pairs of maximally entangled particles out of n pairs of non-maximally entangled particles.

关 键 词：纠缠态 确定性纠缠浓缩 Nielsen定理 

分 类 号：O413.1[理学—理论物理]