duplicatingclassicalbitswithuniversalquantumcloningmachine

	duplicatingclassicalbitswithuniversalquantumcloningmachine
	Wang Minghao; Cai Qingyu
刊名	sciencechinaphysicsmechanicsastronomy
	2019
卷号	62 期号:3
ISSN号	1674-7348
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]
语种	英语
内容类型	期刊论文
源URL	[http://ir.wipm.ac.cn/handle/112942/15246]
专题	中国科学院武汉物理与数学研究所
作者单位	中国科学院武汉物理与数学研究所
推荐引用方式 GB/T 7714	Wang Minghao,Cai Qingyu. duplicatingclassicalbitswithuniversalquantumcloningmachine[J]. sciencechinaphysicsmechanicsastronomy,2019,62(3).
APA	Wang Minghao,&Cai Qingyu.(2019).duplicatingclassicalbitswithuniversalquantumcloningmachine.sciencechinaphysicsmechanicsastronomy,62(3).
MLA	Wang Minghao,et al."duplicatingclassicalbitswithuniversalquantumcloningmachine".sciencechinaphysicsmechanicsastronomy 62.3(2019).