Universal and original-preserving quantum copying is impossible

Feng, Y; Zhang, S; Sun, X; Ying, M

Universal and original-preserving quantum copying is impossible

Feng, Y

Zhang, S Sun, X Ying, M

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Publication Type:: Journal Article
Citation:: Physics Letters, Section A: General, Atomic and Solid State Physics, 2002, 297 (1-2), pp. 1 - 3
Issue Date:: 2002-05-06

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Field	Value	Language
dc.contributor.author	Feng, Y https://orcid.org/0000-0002-3097-3896	en_US
dc.contributor.author	Zhang, S	en_US
dc.contributor.author	Sun, X	en_US
dc.contributor.author	Ying, M https://orcid.org/0000-0003-4847-702X	en_US
dc.date.issued	2002-05-06	en_US
dc.identifier.citation	Physics Letters, Section A: General, Atomic and Solid State Physics, 2002, 297 (1-2), pp. 1 - 3	en_US
dc.identifier.issn	0375-9601	en_US
dc.identifier.uri	http://hdl.handle.net/10453/8977
dc.description.abstract	We show that an arbitrary quantum state cannot be universally 1 → 2 copied keeping the original copy unchanged. Indeed, the density operator of the additional copy after the copying transformation is nothing but the scale product of the identity matrix with factor 1/2, which involves no information of the original state. © 2002 Elsevier Science B.V. All rights reserved.	en_US
dc.relation.ispartof	Physics Letters, Section A: General, Atomic and Solid State Physics	en_US
dc.relation.isbasedon	10.1016/S0375-9601(02)00388-2	en_US
dc.subject.classification	Fluids & Plasmas	en_US
dc.title	Universal and original-preserving quantum copying is impossible	en_US
dc.type	Journal Article
utslib.citation.volume	1-2	en_US
utslib.citation.volume	297	en_US
utslib.for	010503 Mathematical Aspects of Classical Mechanics, Quantum Mechanics and Quantum Information Theory	en_US
utslib.for	020603 Quantum Information, Computation and Communication	en_US
utslib.for	080203 Computational Logic and Formal Languages	en_US
utslib.for	01 Mathematical Sciences	en_US
utslib.for	02 Physical Sciences	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Strength - QSI - Centre for Quantum Software and Information
utslib.copyright.status	open_access
pubs.issue	1-2	en_US
pubs.publication-status	Published	en_US
pubs.volume	297	en_US

Abstract:

We show that an arbitrary quantum state cannot be universally 1 → 2 copied keeping the original copy unchanged. Indeed, the density operator of the additional copy after the copying transformation is nothing but the scale product of the identity matrix with factor 1/2, which involves no information of the original state. © 2002 Elsevier Science B.V. All rights reserved.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/8977