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Extension of the GHJW Theorem for Operator Ensembles
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- Authors
- Jeong Woon Choi, Dowon Hong, Ku-Young Chang, Dong Pyo Chi, Soojoon Lee
- Issue Date
- 2011-01
- Citation
- Physics Letters A, v.375, no.3, pp.430-433
- ISSN
- 0375-9601
- Publisher
- Elsevier
- Language
- English
- Type
- Journal Article
- Abstract
- The Gisin-Hughston-Jozsa-Wootters theorem plays an important role in analyzing various theories about quantum information, quantum communication, and quantum cryptography. It means that any purifications on the extended system which yield indistinguishable state ensembles on their subsystem should have a specific local unitary relation. In this Letter, we show that the local relation is also established even when the indistinguishability of state ensembles is extended to that of operator ensembles. © 2010 Elsevier B.V. All rights reserved.
- KSP Keywords
- Extended system, Local unitary(LU), Quantum Cryptography, Quantum Information, quantum communication