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Improvement of continuous-variable quantum key distribution systems by using optical preamplifiers
Simon Fossier, Eleni Diamanti, Thierry Debuisschert +2
Continuous-variable quantum key distribution protocols, based on Gaussian modulation of the quadratures of coherent states, have been implemented in recent experiments. A present l…
Unconditional security proof of long-distance continuous-variable quantum key distribution with discrete modulation
Anthony Leverrier, Philippe Grangier
We present a continuous-variable quantum key distribution protocol combining a discrete modulation and reverse reconciliation. This protocol is proven unconditionally secure and al…
Field test of a continuous-variable quantum key distribution prototype
Simon Fossier, Eleni Diamanti, Thierry Debuisschert +3
We have designed and realized a prototype that implements a continuous-variable quantum key distribution protocol based on coherent states and reverse reconciliation. The system us…
Observation of collective excitation of two individual atoms in the Rydberg blockade regime
A. Gaëtan, Y. Miroshnychenko, T. Wilk +6
The dipole blockade between Rydberg atoms has been proposed as a basic tool in quantum information processing with neutral atoms. Here we demonstrate experimentally the Rydberg blo…
Unconditional security of continuous-variable quantum key distribution
Anthony Leverrier, Evgueni Karpov, Philippe Grangier +1
The unconditional security of continuous-variable quantum key distribution is established for all schemes based on the estimation of the channel loss and excess noise. It is proved…
Delayed-choice test of complementarity with single photons
Vincent Jacques, E. Wu, Frédéric Grosshans +4
We report an experimental test of complementarity using clock-triggered single-photon pulses emitted by an individual N-V color center in a diamond nanocrystal. The single photons…