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70554 |
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|a dc
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|a Leverrier, Anthony
|e author
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|a Massachusetts Institute of Technology. Research Laboratory of Electronics
|e contributor
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|a Cerf, Nicolas J.
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|a Cerf, Nicolas J.
|e contributor
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|a Leverrier, Anthony
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|a Karpov, Evgueni
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|a Grangier, P.
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|a Cerf, Nicolas J.
|e author
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|a Security of continuous-variable quantum key distribution: towards a de Finetti theorem for rotation symmetry in phase space
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|b Institute of Physics Publishing,
|c 2012-05-09T20:26:32Z.
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|z Get fulltext
|u http://hdl.handle.net/1721.1/70554
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|a Proving the unconditional security of quantum key distribution (QKD) is a highly challenging task as one needs to determine the most efficient attack compatible with experimental data. This task is even more demanding for continuous-variable QKD as the Hilbert space where the protocol is described is infinite dimensional. A possible strategy to address this problem is to make an extensive use of the symmetries of the protocol. In this paper, we investigate a rotation symmetry in phase space that is particularly relevant to continuous-variable QKD, and explore the way towards a new quantum de Finetti theorem that would exploit this symmetry and provide a powerful tool to assess the security of continuous-variable protocols. As a first step, a single-party asymptotic version of this quantum de Finetti theorem in phase space is derived.
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|a European Union (QAP (FP7-ICT-015848)
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|a France. Agence nationale de la recherche (PROSPIQ (ANR-06-NANO-041-05))
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|a France. Agence nationale de la recherche (SEQURE (ANR- 07-SESU-011-01))
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|a Région de Bruxelles-Capitale (Belgium) (project CRYPTASC)
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|a Région de Bruxelles-Capitale (Belgium) (programme Prospective Research for Brussels)
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|a en_US
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|a Article
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|t New Journal of Physics
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