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4 papers · 2 filters
Quantum key distribution using gaussian-modulated coherent states
F. Grosshans, G. Van Assche, J. Wenger +3
Quantum continuous variables are being explored as an alternative means to implement quantum key distribution, which is usually based on single photon counting. The former approach…
Vacuum-field atom trapping in a wide aperture spherical resonator
Jean-Marc Daul, Philippe Grangier
We consider the situation where a two-level atom is placed in the vicinity of the center of a spherical cavity with a large numerical aperture. The vacuum field at the center of th…
Cavity-induced damping and level shifts in a wide aperture spherical resonator
Jean-Marc Daul, Philippe Grangier
We calculate explicitly the space dependence of the radiative relaxation rates and associated level shifts for a dipole placed in the vicinity of the center of a spherical cavity w…
Virtual Entanglement and Reconciliation Protocols for Quantum Cryptography with Continuous Variables
F. Grosshans, N. J. Cerf, J. Wenger +2
We discuss quantum key distribution protocols using quantum continuous variables. We show that such protocols can be made secure against individual gaussian attacks regardless the…