XUAN Dongping,HU Xiaohui,NAN Hua*.Quantum state discrimination based on l1 norm of quantum coherence[J].Journal of Yanbian University,2021,47(02):131-135.
基于l1范数相干度的量子态区分
- Title:
- Quantum state discrimination based on l1 norm of quantum coherence
- 文章编号:
- 1004-4353(2021)02-0131-05
- Keywords:
- quantum coherence; UQSD; coherence measure; mean value of coherence
- 分类号:
- O177.3
- 文献标志码:
- A
- 摘要:
- 为探究区分量子态的最优策略,以相干作为资源,利用附加辅助系统的方法来区分非正交量子态,并给出了l1范数相干度与区分量子态的成功概率之间的数值关系,同时量化了某些特定情况下不出错的量子态区分(UQSD)的最优协议所需的l1范数相干均值.本文的研究结果表明,通过调整生成的相干度可以提高区分量子态的成功几率.
- Abstract:
- In order to explore the optimal strategy of the quantum state discrimination, we use the method of additional auxiliary system to distinguish the non -orthogonal quantum states with coherence as the resource, and give the numerical relationship between the l1 norm of coherence and the success probability of the quantum state discrimination. At the same time, the mean value of the l1 norm of coherence required for the optimal protocol of the unambiguous quantum state discrimination(UQSD)in some specific cases is quantified. Our results show that the success probability of the quantum state discrimination can be improved by adjusting the generated coherence degree.
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备注/Memo
收稿日期: 2021-03-21 *通信作者: 南华(1972—),女,副教授,研究方向为应用泛函分析、量子信息理论.
基金项目: 国家自然科学基金(11961073); 吉林省教育厅“十三五”科学技术研究项目(JJKH20180891KJ)