Duplicating classical bits with universal quantum cloning machine

doi:10.1007/s11433-018-9296-3

	Duplicating classical bits with universal quantum cloning machine
	Cai, QingYu 2; Wang, MingHao 1,2
刊名	SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
	2019-03-01
卷号	62 期号:3 页码:5
关键词	quantum no-cloning classical duplication error-correction correspondence principle
ISSN号	1674-7348
DOI	10.1007/s11433-018-9296-3
英文摘要	It seems there is a large gap between quantum cloning and classical duplication since quantum mechanics forbid perfect copies of unknown quantum states. In this paper, we prove that a classical duplication process can be realized by using a universal quantum cloning machine (QCM). A classical bit is encoded not on a single quantum state, but on a large number of single identical quantum states. Errors are inevitable when copying these identical quantum states due to the quantum no-cloning theorem. When a small part of errors are ignored, i.e., errors as the minority are automatically corrected by the majority, the fidelity of duplicated copies of classical information will approach unity infinitely. In this way, the classical bits can be duplicated precisely with a universal QCM, which presents a natural transition from quantum cloning to classical duplication. The implement of classical duplication by using QCM shines new lights on the universality of quantum mechanics.
资助项目	National Natural Science Foundation of China[11725524] ; National Natural Science Foundation of China[61471356]
WOS关键词	PROBABILISTIC CLONING ; STATE DISCRIMINATION ; CANNOT
WOS研究方向	Physics
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000449972200001
资助机构	National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.wipm.ac.cn/handle/112942/13368]
专题	中国科学院武汉物理与数学研究所
通讯作者	Cai, QingYu
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Wuhan Inst Phys & Math, State Key Lab Magnet Resonances & Atom & Mol Phys, Wuhan 430071, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Cai, QingYu,Wang, MingHao. Duplicating classical bits with universal quantum cloning machine[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2019,62(3):5.
APA	Cai, QingYu,&Wang, MingHao.(2019).Duplicating classical bits with universal quantum cloning machine.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,62(3),5.
MLA	Cai, QingYu,et al."Duplicating classical bits with universal quantum cloning machine".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 62.3(2019):5.