Discrimination between pure states and mixed states

Zhang, C; Wang, G; Ying, M

Discrimination between pure states and mixed states

Zhang, C Wang, G Ying, M

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Publication Type:: Journal Article
Citation:: Physical Review A - Atomic, Molecular, and Optical Physics, 2007, 75 (6)
Issue Date:: 2007-06-06

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Field	Value	Language
dc.contributor.author	Zhang, C	en_US
dc.contributor.author	Wang, G	en_US
dc.contributor.author	Ying, M https://orcid.org/0000-0003-4847-702X	en_US
dc.date.issued	2007-06-06	en_US
dc.identifier.citation	Physical Review A - Atomic, Molecular, and Optical Physics, 2007, 75 (6)	en_US
dc.identifier.issn	1050-2947	en_US
dc.identifier.uri	http://hdl.handle.net/10453/8414
dc.description.abstract	In this paper, we discuss the problem of determining whether a quantum system is in a pure state, or in a mixed state. We apply two strategies to settle this problem: the unambiguous discrimination and the maximum confidence discrimination. We prove that the optimal versions of both strategies are equivalent. Furthermore, the scheme also provides a method to estimate the purity of quantum states, and the Schmidt number of composed systems. © 2007 The American Physical Society.	en_US
dc.relation.ispartof	Physical Review A - Atomic, Molecular, and Optical Physics	en_US
dc.relation.isbasedon	10.1103/PhysRevA.75.062306	en_US
dc.subject.classification	General Physics	en_US
dc.title	Discrimination between pure states and mixed states	en_US
dc.type	Journal Article
utslib.citation.volume	6	en_US
utslib.citation.volume	75	en_US
utslib.for	0205 Optical Physics	en_US
utslib.for	01 Mathematical Sciences	en_US
utslib.for	02 Physical Sciences	en_US
utslib.for	03 Chemical 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	closed_access
pubs.issue	6	en_US
pubs.publication-status	Published	en_US
pubs.volume	75	en_US

Abstract:

In this paper, we discuss the problem of determining whether a quantum system is in a pure state, or in a mixed state. We apply two strategies to settle this problem: the unambiguous discrimination and the maximum confidence discrimination. We prove that the optimal versions of both strategies are equivalent. Furthermore, the scheme also provides a method to estimate the purity of quantum states, and the Schmidt number of composed systems. © 2007 The American Physical Society.

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http://hdl.handle.net/10453/8414