Measuring Entangled Qutrits and Their Use for Quantum Bit Commitment

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Title Measuring Entangled Qutrits and Their Use for Quantum Bit Commitment
Author Langford, N. K.; Dalton, R. B.; Harvey, M. D.; O'Brien, J. L.; Pryde, Geoff; Gilchrist, A.; Bartlett, S. D.; White, A. G.
Journal Name Physical Review Letters
Year Published 2004
Place of publication Ridge, NY
Publisher American Physical Society
Abstract We produce and holographically measure entangled qudits encoded in transverse spatial modes of single photons.With the novel use of a quantum state tomography method that only requires two-state superpositions, we achieve the most complete characterization of entangled qutrits to date. Ideally, entangled qutrits provide better security than qubits in quantum bit commitment: we model the sensitivity of this to mixture and show experimentally and theoretically that qutrits with even a small amount of decoherence cannot offer increased security over qubits.
Peer Reviewed Yes
Published Yes
Publisher URI http://prl.aps.org/
Alternative URI http://dx.doi.org/10.1103/PhysRevLett.93.053601
Copyright Statement Copyright 2004 American Physical Society. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal link for access to the definitive, published version.
Volume 93
Issue Number 5
Page from 053601-1
Page to 053601-4
ISSN 1079-7114
Date Accessioned 2006-06-23
Date Available 2009-09-24T05:54:23Z
Language en_AU
Research Centre Centre for Quantum Dynamics
Faculty Faculty of Science
Subject PRE2009-Physical Sciences; PRE2009-Quantum Optics and Lasers
URI http://hdl.handle.net/10072/16926
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1x

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