相干态的量子净化及其应用

IF 6.4 1区 物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY
Lei Wang, Geng Chai, Zhengwen Cao, Xinlei Chen, Kexin Liang, Jinye Peng
{"title":"相干态的量子净化及其应用","authors":"Lei Wang,&nbsp;Geng Chai,&nbsp;Zhengwen Cao,&nbsp;Xinlei Chen,&nbsp;Kexin Liang,&nbsp;Jinye Peng","doi":"10.1007/s11433-024-2533-4","DOIUrl":null,"url":null,"abstract":"<div><p>The inevitable decoherence of quantum states leaks information to the environments and reduces the practical performance of quantum-information protocols. Quantum purification of coherent states provides an easy-to-implement approach to decouple from the environments utilizing the correlation of several copies. However, repeated transmission of quantum states reduces the randomness of the collectivity and generates security vulnerabilities. In this paper, we propose a modified purification scheme and apply it to the continuous-variable quantum secure direct communication (CV-QSDC) protocol based on coherent states. The designed purification scheme improves the security capacity of communication systems through the effective suppression of excess noises, accompanied by the maintenance of source-side stochasticity. We conduct a proof-of-principle experiment of the purification scheme in the CV-QSDC system. The appearance of transmitted quantum states in phase space and two-dimensional Gaussian distributions have high goodness of fit at two copies. The security capability of this system is improved by 43.6% as the excess noise is reduced to 0.58 times the original noise by purification.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"68 2","pages":""},"PeriodicalIF":6.4000,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Quantum purification for coherent states and its application\",\"authors\":\"Lei Wang,&nbsp;Geng Chai,&nbsp;Zhengwen Cao,&nbsp;Xinlei Chen,&nbsp;Kexin Liang,&nbsp;Jinye Peng\",\"doi\":\"10.1007/s11433-024-2533-4\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The inevitable decoherence of quantum states leaks information to the environments and reduces the practical performance of quantum-information protocols. Quantum purification of coherent states provides an easy-to-implement approach to decouple from the environments utilizing the correlation of several copies. However, repeated transmission of quantum states reduces the randomness of the collectivity and generates security vulnerabilities. In this paper, we propose a modified purification scheme and apply it to the continuous-variable quantum secure direct communication (CV-QSDC) protocol based on coherent states. The designed purification scheme improves the security capacity of communication systems through the effective suppression of excess noises, accompanied by the maintenance of source-side stochasticity. We conduct a proof-of-principle experiment of the purification scheme in the CV-QSDC system. The appearance of transmitted quantum states in phase space and two-dimensional Gaussian distributions have high goodness of fit at two copies. The security capability of this system is improved by 43.6% as the excess noise is reduced to 0.58 times the original noise by purification.</p></div>\",\"PeriodicalId\":774,\"journal\":{\"name\":\"Science China Physics, Mechanics & Astronomy\",\"volume\":\"68 2\",\"pages\":\"\"},\"PeriodicalIF\":6.4000,\"publicationDate\":\"2024-11-22\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Science China Physics, Mechanics & Astronomy\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s11433-024-2533-4\",\"RegionNum\":1,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"PHYSICS, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Science China Physics, Mechanics & Astronomy","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1007/s11433-024-2533-4","RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"PHYSICS, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0

摘要

量子态不可避免的退相干会向环境泄露信息,降低量子信息协议的实际性能。相干态的量子净化提供了一种易于实施的方法,利用多个副本的相关性与环境脱钩。然而,量子态的重复传输会降低集合的随机性,产生安全漏洞。本文提出了一种改进的净化方案,并将其应用于基于相干态的连续可变量子安全直接通信(CV-QSDC)协议。所设计的净化方案通过有效抑制多余噪声,同时保持源侧随机性,提高了通信系统的安全能力。我们在 CV-QSDC 系统中进行了净化方案的原理验证实验。传输的量子态在相空间和二维高斯分布中的外观在两个副本上具有很高的拟合度。该系统的安全能力提高了 43.6%,因为通过净化,过量噪声降低到了原始噪声的 0.58 倍。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Quantum purification for coherent states and its application

The inevitable decoherence of quantum states leaks information to the environments and reduces the practical performance of quantum-information protocols. Quantum purification of coherent states provides an easy-to-implement approach to decouple from the environments utilizing the correlation of several copies. However, repeated transmission of quantum states reduces the randomness of the collectivity and generates security vulnerabilities. In this paper, we propose a modified purification scheme and apply it to the continuous-variable quantum secure direct communication (CV-QSDC) protocol based on coherent states. The designed purification scheme improves the security capacity of communication systems through the effective suppression of excess noises, accompanied by the maintenance of source-side stochasticity. We conduct a proof-of-principle experiment of the purification scheme in the CV-QSDC system. The appearance of transmitted quantum states in phase space and two-dimensional Gaussian distributions have high goodness of fit at two copies. The security capability of this system is improved by 43.6% as the excess noise is reduced to 0.58 times the original noise by purification.

求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
Science China Physics, Mechanics & Astronomy
Science China Physics, Mechanics & Astronomy PHYSICS, MULTIDISCIPLINARY-
CiteScore
10.30
自引率
6.20%
发文量
4047
审稿时长
3 months
期刊介绍: Science China Physics, Mechanics & Astronomy, an academic journal cosponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China, and published by Science China Press, is committed to publishing high-quality, original results in both basic and applied research. Science China Physics, Mechanics & Astronomy, is published in both print and electronic forms. It is indexed by Science Citation Index. Categories of articles: Reviews summarize representative results and achievements in a particular topic or an area, comment on the current state of research, and advise on the research directions. The author’s own opinion and related discussion is requested. Research papers report on important original results in all areas of physics, mechanics and astronomy. Brief reports present short reports in a timely manner of the latest important results.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信