Article Dans Une Revue Physical Review A : Atomic, molecular, and optical physics [1990-2015] Année : 2008

Multidimensional reconciliation for continuous-variable quantum key distribution

Résumé

We propose a new method for extracting an errorless secret key in a continuous-variable quantum key distribution protocol, which is based on Gaussian modulation of coherent states and homodyne detection. The crucial novel feature is an eight-dimensional reconciliation method, based on the algebraic properties of octonions. Since the protocol does not use any postselection, it can be proven secure against arbitrary collective attacks, by using well-established theorems on the optimality of Gaussian attacks. By using this new coding scheme with an appropriate signal to noise ratio, the distance for secure continuous-variable quantum key distribution can be significantly extended.

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hal-00270517 , version 1 (05-04-2016)

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Anthony Leverrier, Romain Alleaume, Joseph Boutros, Gilles Zemor, Philippe Grangier. Multidimensional reconciliation for continuous-variable quantum key distribution. Physical Review A : Atomic, molecular, and optical physics [1990-2015], 2008, 77 (4), pp.042325. ⟨10.1103/PhysRevA.77.042325⟩. ⟨hal-00270517⟩
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