中北大学学报（自然科学版）2018，Vol.39Issue(1)：21-24,4.DOI:10.3969/j.issn.1673-3193.2018.01.004
无限维量子系统上的保真度
Fidelity in the Infinite-Dimensional Quantum Systems
摘要
Abstract
The fidelity in the infinite-dimensional quantum systems was investigated.Firstly,based on the infinite-dimensional version of Uhlmann's theorem of fidelity,the properties of strong concavity, j oint concavity and concavity of quantum fidelity in the infinite-dimensional quantum systems were ob-tained.Next,an elementary proof that the entanglement fidelity was independent on the choice of purifi-cation of the quantum state was given.Finally,the relationship between entanglement fidelity and en-semble average fidelity was discussed,it is concluded that ensemble average fidelity is an upper bound of entanglement fidelity.关键词
无限维量子系统/保真度/纠缠保真度/系综平均保真度Key words
infinite-dimensional quantum systems/fidelity/entanglement fidelity/ensemble average fi-delity分类
数理科学引用本文复制引用
段周波,牛丽芳..无限维量子系统上的保真度[J].中北大学学报（自然科学版）,2018,39(1):21-24,4.基金项目
山西省基础研究计划资助项目(2015021009) （2015021009）
