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Security of Quantum Key Distribution with Coherent States and Homodyne Detection
S. Iblisdir, G. Van Assche, N. J. Cerf
We assess the security of a quantum key distribution protocol relying on the transmission of Gaussian-modulated coherent states and homodyne detection. This protocol is shown to be…
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…
How to measure squeezing and entanglement of Gaussian states without homodyning
Jaromir Fiurasek, Nicolas J. Cerf
We propose a scheme for measuring the squeezing, purity, and entanglement of Gaussian states of light that does not require homodyne detection. The suggested setup only needs beam…
Continuous-variable quantum cryptography is secure against non-gaussian attacks
Frederic Grosshans, Nicolas J. Cerf
A general study of arbitrary finite-size coherent attacks against continuous-variable quantum cryptographic schemes is presented. It is shown that, if the size of the blocks that c…
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…
Adiabatic quantum search algorithm for structured problems
Jérémie Roland, Nicolas J. Cerf
The study of quantum computation has been motivated by the hope of finding efficient quantum algorithms for solving classically hard problems. In this context, quantum algorithms b…