dorsal/arxiv
View SchemaWitnessing effective entanglement in a continuous variable prepare&measure setup and application to a QKD scheme using postselection
| Authors | S. Lorenz, J. Rigas, M. Heid, U. L. Andersen, N. Lütkenhaus, G. Leuchs |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0603271 |
| URL | https://arxiv.org/abs/quant-ph/0603271 |
| DOI | 10.1103/PhysRevA.74.042326 |
Abstract
We report an experimental demonstration of effective entanglement in a prepare&measure type of quantum key distribution protocol. Coherent polarization states and heterodyne measurement to characterize the transmitted quantum states are used, thus enabling us to reconstruct directly their Q-function. By evaluating the excess noise of the states, we experimentally demonstrate that they fulfill a non-separability criterion previously presented by Rigas et al. [J. Rigas, O. G\"uhne, N. L\"utkenhaus, Phys. Rev. A 73, 012341 (2006)]. For a restricted eavesdropping scenario we predict key rates using postselection of the heterodyne measurement results.
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"abstract": "We report an experimental demonstration of effective entanglement in a\nprepare\u0026measure type of quantum key distribution protocol. Coherent\npolarization states and heterodyne measurement to characterize the transmitted\nquantum states are used, thus enabling us to reconstruct directly their\nQ-function. By evaluating the excess noise of the states, we experimentally\ndemonstrate that they fulfill a non-separability criterion previously presented\nby Rigas et al. [J. Rigas, O. G\\\"uhne, N. L\\\"utkenhaus, Phys. Rev. A 73, 012341\n(2006)]. For a restricted eavesdropping scenario we predict key rates using\npostselection of the heterodyne measurement results.",
"arxiv_id": "quant-ph/0603271",
"authors": [
"S. Lorenz",
"J. Rigas",
"M. Heid",
"U. L. Andersen",
"N. L\u00fctkenhaus",
"G. Leuchs"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.74.042326",
"title": "Witnessing effective entanglement in a continuous variable prepare\u0026measure setup and application to a QKD scheme using postselection",
"url": "https://arxiv.org/abs/quant-ph/0603271"
},
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