Measuring Entangled Qutrits and Their Use for Quantum Bit Commitment

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dc.creatorLangford, Nathan K.
dc.creatorDalton, Rohan B.
dc.creatorHarvey, Michael D.
dc.creatorO'Brien, Jeremy L.
dc.creatorPryde, Geoffrey J.
dc.creatorGilchrist, Alexei
dc.creatorBartlett, Stephen D.
dc.creatorWhite, Andrew G.
dc.date2003-12-09
dc.date2004-08-14
dc.date.accessioned2026-07-07T11:40:45Z
dc.date.available2026-07-07T11:40:45Z
dc.descriptionWe 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 characterisation 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.
dc.descriptionPaper updated to match published version; 5 pages, 4 figures, images have been included at slightly lower quality for the archive
dc.identifierhttps://arxiv.org/abs/quant-ph/0312072
dc.identifierhttp://arxiv.org/abs/quant-ph/0312072
dc.identifierPhys.Rev.Lett.93:053601,2004
dc.identifierdoi:10.1103/PhysRevLett.93.053601
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/200350
dc.subjectQuantum Physics
dc.titleMeasuring Entangled Qutrits and Their Use for Quantum Bit Commitment
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