dorsal/arxiv
View SchemaMeasuring Entangled Qutrits and Their Use for Quantum Bit Commitment
| Authors | Nathan K. Langford, Rohan B. Dalton, Michael D. Harvey, Jeremy L. O'Brien, Geoffrey J. Pryde, Alexei Gilchrist, Stephen D. Bartlett, Andrew G. White |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0312072 |
| URL | https://arxiv.org/abs/quant-ph/0312072 |
| DOI | 10.1103/PhysRevLett.93.053601 |
| Journal | Phys.Rev.Lett.93:053601,2004 |
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 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.
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"abstract": "We produce and holographically measure entangled qudits encoded in transverse\nspatial modes of single photons. With the novel use of a quantum state\ntomography method that only requires two-state superpositions, we achieve the\nmost complete characterisation of entangled qutrits to date. Ideally, entangled\nqutrits provide better security than qubits in quantum bit-commitment: we model\nthe sensitivity of this to mixture and show experimentally and theoretically\nthat qutrits with even a small amount of decoherence cannot offer increased\nsecurity over qubits.",
"arxiv_id": "quant-ph/0312072",
"authors": [
"Nathan K. Langford",
"Rohan B. Dalton",
"Michael D. Harvey",
"Jeremy L. O\u0027Brien",
"Geoffrey J. Pryde",
"Alexei Gilchrist",
"Stephen D. Bartlett",
"Andrew G. White"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevLett.93.053601",
"journal_ref": "Phys.Rev.Lett.93:053601,2004",
"title": "Measuring Entangled Qutrits and Their Use for Quantum Bit Commitment",
"url": "https://arxiv.org/abs/quant-ph/0312072"
},
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