Measuring entangled qutrits and their use for quantum bit commitment

Langford, N. K., Dalton, R. B., Harvey, M. D., O'Brien, J. L., Pryde, G. J., Gilchrist, A., Bartlett, S. D. and White, A. G. (2004) Measuring entangled qutrits and their use for quantum bit commitment. Physical Review Letters, 93 5: 053601. doi:10.1103/PhysRevLett.93.053601

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Author Langford, N. K.
Dalton, R. B.
Harvey, M. D.
O'Brien, J. L.
Pryde, G. J.
Gilchrist, A.
Bartlett, S. D.
White, A. G.
Title Measuring entangled qutrits and their use for quantum bit commitment
Journal name Physical Review Letters   Check publisher's open access policy
ISSN 0031-9007
Publication date 2004-01-01
Year available 2004
Sub-type Article (original research)
DOI 10.1103/PhysRevLett.93.053601
Open Access Status File (Publisher version)
Volume 93
Issue 5
Start page 053601
Total pages 4
Editor Martin Blume
Place of publication USA
Publisher American Physical Society
Language eng
Subject C1
240402 Quantum Optics and Lasers
780102 Physical sciences
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.
Keyword quantum optics
quantum computation
Light-beams
Photons
States
Q-Index Code C1
Institutional Status UQ

 
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Created: Wed, 15 Aug 2007, 14:31:18 EST